Abstract
We analyse the portrayal of sex and drug use in the most popular movies of the last 20 years using the Internet Movie Database list of the top 200 movies of all time. Films released or set prior to the HIV era (pre 1983), animated, not about humans or G/PG rated, were excluded. Films were reviewed by one of two teams of two observers using a data extraction sheet tested for inter-rater reliability. Sexual activity, sexually transmitted disease (STD) prevention, birth control measures, drug use and any consequences discussed or depicted were recorded.
There were 53 sex episodes in 28 (32%) of the 87 movies reviewed. There was only one suggestion of condom use, which was the only reference to any form of birth control. There were no depictions of important consequences of unprotected sex such as unwanted pregnancies, HIV or other STDs. Movies with cannabis (8%) and other non-injected illicit drugs (7%) were less common than those with alcohol intoxication (32%) and tobacco use (68%) but tended to portray their use positively and without negative consequences. There were no episodes of injected drug use.
Sex depictions in popular movies of the last two decades lacked safe sex messages. Drug use, though infrequent, tended to be depicted positively. The social norm being presented is concerning given the HIV and illicit drug pandemics.
INTRODUCTION
The movie industry influences the perceptions of billions of people around the world. The top 200 movies in cinematic history have grossed in excess of $70 billion US dollars1 in box office takings alone: with globalization and the proliferation of home-based media technologies movies are becoming ever more accessible to wider audiences. Movies often address and depict health-related behaviours and have the potential to model conduct and communicate normative propositions about matters such as unsafe sex and recreational drug use as well as health-promoting messages about these issues.
The World Health Organization (WHO) reported that in 2003 there were over 40 million people living with HIV/AIDS including 5 million newly infected with HIV.2–3 Addressing this problem in part requires population behaviour change relating to unsafe sexual practices and injected drug use. Social Cognitive Theory suggests that social norms are an important factor to consider when advocating behaviour change.4 Observation of influential role models and the consequences of their actions affects our behaviour. This observational learning contributes to the individual's confidence in their own ability to change their behaviour.5 However, public health campaigns advocating safe sex practices are often not complemented by social campaigns designed to change the social norm of unprotected sex.
Despite the magnitude of the HIV/AIDS problem only around half of American men who have sex with men and who use injected drugs report that they always use a condom.6 Indeed, given recall bias, this figure is likely to be inflated. Condoms are the most effective method to reduce the spread of sexually transmitted diseases (STDs) other than celibacy,7 and their use is advocated by international bodies including the Centers for Disease Control8 and WHO.9 Despite this knowledge, condoms are consistently not the norm in sexual practice.10
There is convincing evidence that the entertainment media influences behaviour. This explains why product placement is an important form of advertising for tobacco companies.11 Smoking in movies promotes the uptake of smoking by adolescents12 and a dose–response relationship has been demonstrated for television viewing and initiation of smoking in the young.13 This has led to the call to use ratings to restrict access to movies with smoking.14 An association has been posited between television viewing and alcohol consumption in adolescents.15 A survey of American teenagers who engaged in risky behaviours, including sexual intercourse and drug use, showed they spent more time watching television than their peers.16 Recently, there has been renewed concern about the impact on children of constant exposure to violence in the mass media,17 reflecting concerns raised by the Surgeon General of America three decades ago.18
There is a paucity of data specifically addressing popular movies and their impact on population sexual and drug taking behaviour. The recent National Youth Anti-drug Media Campaign content analysis found that most popular movies depicted alcohol and smoking and many depicted illicit drug use.19 Cross-sectional survey data have shown an association between black adolescent American females' exposure to X-rated movies and negative attitudes towards safe sex practices.20 Given that adolescents spend between 3–6 hours every day watching various forms of media entertainment21–23 (more time than any activity except sleep), a better understanding of the content of these messages is long overdue.
METHODS
We used the Internet Movie Database [www.imdb.com] list of the top 200 movies of all time worldwide, from 30 September 2003.1 This list was produced using international box office gross receipts without adjusting for inflation. Our assumption was that box office takings were a proxy for viewing numbers.
Exclusion criteria
To avoid viewing movies unlikely to depict sex or drug use or which reflected the pre-HIV era, five pre-determined exclusion criteria were applied (Table 1). The impact of HIV on world health became evident soon after its identification in 198124,25 and so films released or set before 1983 were excluded. We also excluded animated films, as audiences are less likely to identify with their characters, although we note they often show smoking and alcohol.26 Similarly, Australian Office of Film and Literature Classification G (General) and PG (parental guidance) rated films were excluded—they very rarely depict sexual acts. Had we used the British Board of Film Classification ratings this would only have made a 3% difference to the excluded movie list. From the original list of the top 200 movies, 113 were excluded leaving 70 M rated (Mature Audience) and 17 R rated (restricted) movies for review.
Table 1.
Top 200 box-office movies of all time
Criteria | No. (%) |
---|---|
Excluded | |
Released prior to 1983 | 15 (8) |
Set prior to 1983 | 24 (12) |
Animated films | 14 (7) |
Films about non-humans | 0 (0) |
G or PG rated films | 60 (30) |
Included | 87 (44) |
Total | 200 (100) |
Data extraction sheet design
Data extraction sheets were designed in the pilot phase to enable recording information about each episode of apparent sexual intercourse and the total counts of cannabis, non-injected, and injected drug use. Smoking and alcohol use have been previously reported27–29 and so only their presence was recorded in this study. Alcohol intoxication rather than consumption was noted, as responsible use is not harmful to health. A 'comments' section was included to record quotes with sex-related public health messages (see Appendix 1).
APPENDIX 1:
Data Analysis Sheets
SEX | Reviewers | ○ HG/SC | MOVIE... | ||||
---|---|---|---|---|---|---|---|
|
|
|
○ JA/TR
|
YEAR...
|
RATING...
|
||
Youngest age of participant | Partnership | Partner Status | Type of Sex | Sexually transmitted diseases (STDs) prevention | Type of birth control shown or implied ONLY MALE–FEMALE VAGINAL WHERE PREGNANCY POSSIBLE | Consequence side effects and outcomes | |
1 | ○ Adolescent | ○ Multiple | ○ Married/ de facto | ○ Vaginal | ○ Condoms discussed | ○ Condom | ○ HIV |
○ Young adult | ○ Heterosexual | ○ Regular partner | ○ Anal | ○ Barrier method (not condom) | ○ Other STD (not HIV) | ||
○ Older adult | ○ Homosexual | ○ New partner(s) | ○ Oral | ○ Condoms used | |||
○ Other | ○ Other | ○ Other | ○ Contraceptive pill | ○ unwanted pregnancy | |||
... | ... | ... | ○ No condom | ○ Rhythm method | |||
○ Don't know | ○ NOT USED/IMPLIED | ○ Social problems | |||||
○ NONE | |||||||
○ No chance of pregnancy | ○ Other | ||||||
... | |||||||
... | |||||||
2 | ○ Adolescent | ○ Multiple | ○ Married/ de facto | ○ Vaginal | ○ Condoms discussed | ○ Condom | ○ HIV |
○ Young adult | ○ Heterosexual | ○ Regular partner | ○ Anal | ○ Barrier method (not condom) | ○ Other STD (not HIV) | ||
○ Older adult | ○ Homosexual | ○ New partner(s) | ○ Oral | ○ Condoms used | |||
○ Other | ○ Other | ○ Other | ○ Contraceptive pill | ○ Unwanted pregnancy | |||
... | ... | ... | ○ No condom | ○ Rhythm method | |||
○ Don't know | ○ NOT USED/IMPLIED | ○ Social problems | |||||
○ NONE | |||||||
○ No chance of pregnancy | ○ Other | ||||||
... | |||||||
... | |||||||
3 | ○ Adolescent | ○ Multiple | ○ Married/ de facto | ○ Vaginal | ○ Condoms discussed | ○ Condom | ○ HIV |
○ Young adult | ○ Heterosexual | ○ Regular partner | ○ Anal | ○ Barrier method (not condom) | ○ Other STD (not HIV) | ||
○ Older adult | ○ Homosexual | ○ New partner(s) | ○ Oral | ○ Condoms used | |||
○ Other | ○ Other | ○ Other | ○ Contraceptive pill | ○ Unwanted pregnancy | |||
... | ... | ... | ○ No condom | ○ Rhythm method | |||
○ Don't know | ○ NOT USED/IMPLIED | ○ Social problems | |||||
○ NONE | |||||||
○ No chance of pregnancy | ○ Other | ||||||
... | |||||||
... |
APPENDIX 1.
(Continued)
DRUGS | Reviewers | ○ HG/SC | MOVIE... | |||||
---|---|---|---|---|---|---|---|---|
○ JA/TR | ||||||||
Main (Billed) characters | ... | |||||||
... | YES | NO | ||||||
Any Smoking | ○ | ○ | ||||||
|
|
|
|
|
Alcohol/Intoxication
|
○
|
○
|
|
Age (counts) | Tot n | Character (counts) | Tot n | Depiction (counts) | Tot n | Consequences (document each one) | Tot n | |
CANNABIS | Adolescent | Main | Positive | ○ Yes (describe each separately) | ||||
Young adult | Supporting | Negative | ||||||
Older adult | Background | Neutral | ||||||
ILLICIT | Adolescent | Main | Positive | ○ Yes (describe each separately) | ||||
Young adult | Supporting | Negative | ||||||
Older adult | Background | Neutral | ||||||
INJECTED | Adolescent | Main | Clearly new needle | ○ Yes (describe each separately) | ||||
Young adult | Supporting | Clearly shared needle | ||||||
Older adult | Background | Unsure | ||||||
Adolescent=0–18, school or similar age Young adult=19–25, e.g. university age Older adult=all other adults | Main=given billing in movie credits Supporting=other regular cast members Background=all others, e.g. crowd scene | See reviewer instructions for details | If 2 or more negative consequences for a single episode of drug use then (bracket together) |
Defining an act of sexual intercourse presented coding challenges as these movies were designed for mass release to worldwide audiences and rarely depicted explicit scenes. Reviewers were instructed to code any episode in which an overtly sexual physical encounter either took place or was implied which could potentially result in an unwanted pregnancy or the transmission of an STD.
Pilot phase
Six films were reviewed in the pilot phase with an 88% (95% CI30 67–97%) concordance for the data points relating to sex depictions. Discrepancies related to estimated character ages and one to whether or not there were social consequences resulting from a sexual encounter. There were similar differences with the drug depictions and misunderstandings between the reviewers were clarified before the study phase.
Study phase
The movies included were reviewed by one of two teams of reviewers. Each team had two members who participated in the data extraction sheet formulation. The names of main characters were recorded prior to watching the movie to avoid recall bias affecting their classification (main/supporting/background). Two reviewers watched each film to minimize omissions due to concentration lapses. Each movie was watched through to the ending credits. Where available, the longer director's cuts and extended versions were viewed in preference to standard releases.
Inter-rater reliability phase
After all included movies had been reviewed we analysed inter-rater reliability. This was not randomized as many movies would not have any depictions of sex or drug use, and therefore a comparison between the two reviewing teams would be biased towards agreement. Coders could not be blinded to movie selection for the inter-rater comparison as we used the five movies from each reviewing team's list with the most episodes of sex and drug use. The other team then reviewed these movies.
The agreement of each individual data point recorded by each team for each of these 10 movies was compared. The total concordant data points were divided by the total number of data points to give an overall percentage inter-rater reliability.
RESULTS
Sixty-five of 87 movies (75%) depicted a negative health behaviour defined as: unprotected sex (32%); use of cannabis (8%); non-injected illicit drug use (7%); smoking (68%); or alcohol intoxication (32%). Assuming all excluded movies had no incidents showing sex or drug use, at least a third (33%) of the 200 most popular movies of the last 20 years depicted negative health behaviours.
Sex depictions
There were 28 movies that depicted one to seven episodes of sexual intercourse, giving a total of 53 individual episodes. Depictions were, typically, new heterosexual adult partners engaging in vaginal sex (40% episodes). There was one scene of homosexual (oral) sex.
There were 16 movies which depicted unprotected sex between new partners and a further 11 which depicted unprotected sex between married, de facto or regular partners. There was only a single sex episode in which condoms were assumed to have been used, given a previous discussion between the characters, but no episodes of definitive use. This single episode was also the only time any form of birth control was used in the 45 episodes of sex which could have resulted in pregnancy. Therefore, in 98% of sexual episodes in which pregnancy was a possible outcome, no form of birth control was used or suggested (Table 2).
Table 2.
Summary of sex depictions (N=53)
Feature | No. (%) |
---|---|
Youngest participant age | |
Adolescent (≤ 18) | 0 (0) |
Young adult (19–25) | 13 (25) |
Older adult (> 25) | 40 (75) |
Nature of partnership | |
Multiple partners | 2 (4) |
Heterosexual partnership | 49 (92) |
Homosexual partnership | 1 (2) |
Unclear | 1 (2) |
Relationship | |
Married/de facto | 6 (11) |
Regular partners | 9 (17) |
New partners | 37 (70) |
Unclear | 1 (2) |
Type of sex depicted | |
Vaginal | 45 (85) |
Anal | 0 (0) |
Oral | 7 (13) |
Unclear | 1 (2) |
STD prevention | |
Condoms used | 0 (0) |
Condoms discussed | 1 (2) |
Definitely no condom | 38 (72) |
Unclear | 14 (26) |
Birth control | |
Condom | 1 (2) |
No birth control | 44 (83) |
No risk pregnancy | 8 (15) |
Consequences | |
None depicted | 47 (89) |
Social problems | 2 (4) |
Murder | 2 (4) |
Physical harm | 1 (2) |
Car accident | 1 (2) |
In 47 of 53 sex episodes (89%) no clear consequences were portrayed. In two episodes there were social problems for the characters, such as marital discord from discovered infidelity, and social embarrassment. In two episodes a partner was murdered during the act (one was a rape). In one episode a participant was injured by violent but consensual sex. In one episode a car accident resulted from oral sex while driving. None of the movies portrayed HIV transmission, other STDs or unwanted pregnancies.
There were several references to condoms using terms such as 'rubbers' and 'protection'. There were also some references to the spread of STDs ('disease-spreading whore' and 'I get checked every month'). Promiscuous behaviour was glorified ('I got laid 23 times this year', 'He's called rabbit 'cos he likes to fuck a lot') and celibacy was ridiculed ('If he decides to take the lock off his cock'). There were scant references to birth control (robot prostitute: 'You're not going to get us pregnant').
Drug depictions
Seven of the 87 movies (8%) depicted between one and 10 episodes of cannabis usage (mean=3.9, SD=3.58). There were a total of 27 distinct episodes which involved mainly adult characters (74%) who were not in main roles (77%). Cannabis usage was shown in a positive light in 14 episodes (52%), a neutral light in 13 (48%), with no negative depictions. There were no negative consequences from cannabis use depicted (Table 3).
Table 3.
Summary of drug depictions (N=27)
Feature | Cannabis No. (%) | Non-injected drug use No. (%) | ||
---|---|---|---|---|
Youngest age of user | ||||
Adolescent (≤ 18) | 0 | (0) | 0 | (0) |
Young adult (19–25) | 20 | (74) | 0 | (0) |
Older adult (> 25) | 7 | (26) | 13 | (100) |
Character significance | ||||
Main | 6 | (22) | 4 | (31) |
Supporting | 12 | (44) | 1 | (8) |
Background | 9 | (33) | 8 | (62) |
Nature of depiction | ||||
Positive | 14 | (52) | 10 | (77) |
Negative | 0 | (0) | 0 | (0) |
Neutral | 13 | (48) | 3 | (23) |
Consequences | ||||
None depicted | 27 | (100) | 12 | (92) |
Murder | 0 | (0) | 1 | (8) |
Six of the 87 movies (7%) depicted non-injected illicit drug use. Within those movies the number of episodes of non-injected illicit drug use ranged between one and five episodes (mean=2.2, SD=1.60), with a total of 13 individual episodes. Depictions were typically of an older adult in a background role and portrayed in a positive light. In three of the 13 episodes the portrayal was neutral but none of the portrayals were considered to be negative. The only consequence depicted was a murdered addict.
At least one character was seen smoking in 59 (68%) of the movies and intoxicated with alcohol in 28 (32%). No movies depicted injected drug use.
Inter-rater reliability
There was an overall data point concordance between the two reviewing teams of 86% (95% CI 83–89%), with 79% (95% CI 74–84%) concordance for the sex depictions and 90% (95% CI 87–93%) concordance for the drug depictions.
Of 594 individual data points there were 45 differences between teams in the coding of sexual episodes. There were 15 'no condom' versus 'don't know' discrepancies. Another two disagreements related to the youngest participant's age, one to an incorrect 'no condom' oral sex misclassification (rather than 'no chance of pregnancy') and eight partner misclassifications ('regular' versus 'new'). These issues accounted for the majority of differences between the two teams. Importantly, there were no disagreements between the teams as to whether condoms were used or whether important health consequences of unprotected sex, such as HIV, STDs and unwanted pregnancies, were portrayed.
The majority of the 37 differences in the drug use section also related to the character's age and status in the film (main, supporting or background). There were 'positive' versus 'neutral' differences but neither team scored drug taking as portrayed in a 'negative' light.
Excluding these differences would increase the overall inter-rater reliability to 95%.
DISCUSSION
This study highlights how popular movies over the last two decades have commonly depicted negative health behaviours such as unprotected sex between new partners, cannabis use, non-injected drug use, smoking, and alcohol intoxication. Only one in four movies reviewed was free from any of these depictions. It is remarkable that although one in three popular movies depicted sexual intercourse there was only one instance in which a condom may have been used. This is despite sexual intercourse rarely being depicted in monogamous relationships as found by Greenberg.31
There were no references to important consequences of unsafe sex such as HIV transmission, spread of other STDs or unwanted pregnancy. The only consequences depicted were arguably irrelevant to public health (e.g. social embarrassment). Comments made by characters during the movies reinforced promiscuity and ridiculed monogamy and celibacy consistent with previous research.32
Movies depicted drug use far less commonly than unprotected sex, with the exception of smoking (68%) and alcohol intoxication (32%). These findings reinforce previous studies that have documented the prevalence of smoking11 and alcohol in the mass media.33 However, a previous study reported a higher proportion of movies (98%) depicting negative health behaviours.19 This was due to their inclusion of any alcohol consumption and any use of over-the-counter or prescription medicines. This is the first study to demonstrate both the tendency to depict the use of these drugs in a positive light and not to depict any consequences arising from the use of these drugs contrasting with Terre et al.34 Interestingly cannabis tended to be used by younger characters and injected drug use was absent, perhaps reflecting the target audiences.
A recent analysis of sex on television found that fewer (14%) shows depicted or strongly implied sexual intercourse than we found in movies. However, an increasing number (15%) included a safe sex message contrasting with our findings.35
Deciding whether a scene depicts a sexual encounter and whether safe sex practices were adopted will always be subjective. Different audiences can sometimes interpret the same scenes differently and discerning this was beyond the scope of our study. Data are required on how different subpopulations respond to the public health messages in the media and which subpopulations are watching what movies. Such analyses would be more appropriately conducted using different methodologies (e.g. focus groups). We also acknowledge that no attempt was made to differentiate fleeting depictions with more influential prolonged depictions of the negative health behaviours we studied.
The regular exposure to unprotected sex with new partners and recreational drug use by influential movie stars in combination with an absence of negative consequence from these actions must be considered in the context of the difficulty experienced by public health advocates in changing population behaviours. This observational learning, using Social Cognitive Theory, may exert a significant competing influence to the safe sex and 'just say no' messages propounded by some optimistic public health officials. Unsafe sex and recreational drug use in movies could potentially have a similar effect to the influence of media on smoking,12,13 alcohol14 and violent behaviours.17
CONCLUSION
The most popular movies of the last two decades often show normative depictions of negative health behaviours. The motion picture industry should be encouraged to depict safer sex practices and to depict the real consequences of unprotected sex and illicit drug use.
Acknowledgments
We thank Jeevaka Amaranath and Tristan Rappo for assisting with movie reviewing and the Internet Movie Database for permission to use their top 200 movie list.
References
- 1.Internet Movie Database (IMDB). The Top Grossing Movies of All Time at the Worldwide Box Office. [www.imdb.com/Charts/worldtopmovies]. Accessed 3 March 2004
- 2.World Health Organization. AIDS Epidemic Update. Geneva: WHO, 2003. [www.who.int/hiv/pub/epidemiology/en/epiupdate2003_I_en.pdf]. Accessed 3 March 2004
- 3.UNAIDS/WHO. AIDS Epidemic Update. Geneva: UNAIDS, 2002
- 4.Nutbeam D, Harris E. Theory In a Nutshell: a Guide To Health Promotion Theory. Sydney: McGraw-Hill, 1999: 30-1
- 5.Bandura A. Social Foundations of Thought and Action: a Social Cognitive Theory. Englewood Cliffs, NJ: Prentice Hall, 1986
- 6.Centers for Disease Control. HIV/AIDS among men who have sex with men and inject drugs—United States, January 1985–December 1998. MMWR Morb Mortal Wkly Rep 2000;49: 465-70 [PubMed] [Google Scholar]
- 7.Hanenberg RS, Rojanapithayakorn W, Kunasol P, Sokal DC. Impact of Thailand's HIV-control programme as indicated by the decline of sexually transmitted infections. Lancet 1994;344: 243-5 [DOI] [PubMed] [Google Scholar]
- 8.Centres for Disease Control. Male Latex Condoms and Sexually Transmitted Diseases, 2004. [www.cdc.gov/nchstp/od/latex.htm]. Accessed 7 March 2004
- 9.World Health Organization. Factsheet: Effectiveness Of Male Latex Condoms In Protecting Against Pregnancy and Sexually Transmitted Infections. June, 2000 [www.who.int/mediacentre/factsheets/fs243/en/]. Accessed 1 March 2004
- 10.Van der Ven P, Kippax S, Knox S, Prestage B, Crawford J. HIV treatments optimism and sexual behaviour among gay men in Sydney and Melbourne. AIDS 1999;13: 2289-94 [DOI] [PubMed] [Google Scholar]
- 11.Sargent JD, Dalton MA, Ahrens MB, Beach ML,Tickle JT, Heatherton TF. Brand appearances in contemporary cinema films and contribution to global marketing of cigarettes. Lancet 2001;357: 29-32 [DOI] [PubMed] [Google Scholar]
- 12.Dalton MA, Sargent JD, Beach ML, et al. Effect of viewing smoking in movies on adolescent smoking initiation: a cohort study. Lancet 2003;362: 281-5 [DOI] [PubMed] [Google Scholar]
- 13.Gidwani PP, Sobol A, DeJong W, Perrin JM, Gortmakes SL. Television viewing and initiation of smoking among youth. Pediatrics 2002;110: 505-8 [DOI] [PubMed] [Google Scholar]
- 14.Glantz S. Smoking in movies: a major problem and a real solution. Lancet 2003;362: 258-9 [DOI] [PubMed] [Google Scholar]
- 15.Robinson T, Chen HL, Killen JD. Television and music video exposure and risk of adolescent alcohol use. Pediatrics 1998;102: e54. [DOI] [PubMed] [Google Scholar]
- 16.Klein JD, Brown JD, Walsh Childers K, Oliveri J, Porter C, Dykers C. Adolescents' risky behavior and mass media use. Pediatrics 1993;92: 24-31 [PubMed] [Google Scholar]
- 17.Committee on Public Education. American Academy of Pediatrics. Media violence. Committee on Public Education. Pediatrics 2001;108: 1222-6 [DOI] [PubMed] [Google Scholar]
- 18.US Surgeon General's Scientific Advisory Committee on Television and Social Behaviour. Television and Growing up: The Impact of Televised Violence. Washington DC: US Government Printing Office, 1972
- 19.Roberts DF, Henriksen L, Christenson P. Substance Use In Popular Movies and Music. Office of National Drug Control Policy and Department of Health and Human Services Substance Abuse and Mental Health Services Administration [www.mediacampaign.org/publications/movies/movie_partII]. Accessed 19 August 2003
- 20.Wingwood GM, DiClemente RJ, Harrington K, Davies S, Hook EW, Oh MK. Exposure to X-rated movies and adolescent's sexual and contraceptive-related attitudes and behaviours. Pediatrics 2001;107 1116-19 [DOI] [PubMed] [Google Scholar]
- 21.Kaur H, Choi WS, Mayo MS, Harris KJ. Duration of television watching is associated with increased body mass index. J Pediat 2003;143: 506-11 [DOI] [PubMed] [Google Scholar]
- 22.AC Nielson Company. 1990 Nielson Report on Television. New York, NY: Nielson Media Research, 1990
- 23.Roberts DF. Media and youth: access, exposure, and privatization. Journal of Adolescent Health 2000;27(2 suppl): 8-14 [DOI] [PubMed] [Google Scholar]
- 24.Centers for Disease Control. Pneumocystis pneumonia—Los Angeles. MMWR Morb Weekly Rep 1981;30: 250-2 [PubMed] [Google Scholar]
- 25.Gottlieb MS, Schroff R, Schanker HM, et al. Pneumocystis carinii pneumonia and mucosal candidiasis in previously healthy homosexual men: evidence of a new acquired cellular immunodeficiency. N Engl J Med 1981;305: 1425-31 [DOI] [PubMed] [Google Scholar]
- 26.Thompson KM, Yokota FMS. Depiction of alcohol, tobacco, and other substances in G-rated animated feature films. Pediatrics 2001;107: 1369-74 [DOI] [PubMed] [Google Scholar]
- 27.Dalton MA, Tickle JJ, Sargent JD, Beach ML, Ahrens MB, Heatherton TF. The incidence and context of tobacco use in popular movies from 1988 to 1997. Prevent Med 2002;34: 516-23 [DOI] [PubMed] [Google Scholar]
- 28.Goldstein AO, Sobel RA, Newman GR. Tobacco and alcohol use in G-rated children's animated films. JAMA 1999;281: 1131-6 [DOI] [PubMed] [Google Scholar]
- 29.Everett SA, Schnuth RL, Tribble JL. Tobacco and alcohol use in top-grossing American films. J Commun Health 1998;23: 317-24 [DOI] [PubMed] [Google Scholar]
- 30.Ciba-Geigy. Geigy Scientific Tables, 8th edn, Vol. 2 New Jersey: Ciba-Geigy, 1993
- 31.Greenberg BS, Siemicji M, Dorfman S, et al. Sex content in R-rated films viewed by adolescents. In: Greenberg BS, Brown JD, Buerkel-Rothfuss N, eds. Media, Sex and the Adolescent. Cresskill, NJ: Hampton Press, 1993: 45-58
- 32.Pardun CJ. Romancing the script: identifying the romantic agenda in top-grossing movies. In: Brown JD, Steele JR, Walsh-Childers K, eds. Sexual Teens, Sexual Media. Mahwah, NJ: Lawrence Erlbaum, 2002: 211-25
- 33.Tucker LA. Television's role regarding alcohol use among teenagers. Adolescence 1985;20: 593-8 [PubMed] [Google Scholar]
- 34.Terre L, Drabman RS, Speer P. Health-relevant behaviors in Media. J Appl Soc Psychol 1991;21: 1303-19 [Google Scholar]
- 35.Kaiser Family Foundation Biennial Report. Sex on TV 3: Sex Is Getting Safer [www.kff.org/entmedia]. Accessed 22 July 2005