Table 1.

Data collected using Web-based self-completed Human papillomavirus Infection and Transmission among Couples through Heterosexual activity (HITCH) questionnaires, 2005-2011.

Domain	Baseline data	Follow-up data (updates since last interview)
Sociodemographic	Sex, date of birth, place of birth (country, Canadian province), marital status, ethnicity, education status, educational institution, highest education level, employment status, parental highest level of education, financial situation while growing up	Marital status, education status, educational institution, highest education level, employment status
Smoking	Personal history of cigarette smoking (duration, quantity, and frequency)	Initiation and continuation and cessation (quantity)
Reproductive historya	Age at menarche, current and previous pregnancies	Current pregnancy, pregnancy since the last interview
Lifetime sexual history	Number of sexual partners (males and females, all routes), number of sexual partners (vaginal), age at first vaginal sexual intercourse, sexual orientation	N/Ab
Sexual activity with enrolled HITCH partner	Partner date of birth, relationship status with partner, date of first engagement in sexual activity, topics discussed together (pregnancy prevention, sexually transmitted disease prevention, sexual history, ever had a sexually transmitted disease, ever tested for sexually transmitted disease including HIV/AIDS), number of previous partners involving vaginal intercourse, presence of a sexually transmitted infection, partner circumcised, frequency of engagement in sexual activities (per week, per month), frequency of masturbation (for each), frequency of oral sex (for each), vaginal intercourse (date of first and last occurrence, frequency, ie, per week, per month), condom use (frequency, breakage or slip off, put before starting vaginal intercourse, taken off during vaginal intercourse), anal intercoursec	Sexual activity with HITCH partner (date of enrollment of HITCH partnerc; date of birth of HITCH partnerc; relationship status; date of first engagement in sexual activity; topics discussed together, similar listc; lifetime number of partners involving vaginal intercoursec; ever had a sexually transmitted infectionc; partner circumcisedc; number of times engaged in sexual activities since the last interview, per week, per month; frequency of masturbation, for each; oral sex, for each; vaginal intercourse, date of first and last occurrence; frequency, per week, per month; condom use regarding frequency, breakage or slip off, put before starting vaginal intercourse, taken off during vaginal intercourse; anal intercoursed), ongoing sexual relationship, date of end of sexual relationship with HITCH partner, engagement in sexual activity with someone other than HITCH partner
Sexual activity with other partners	Concurrent sexual activity with someone other than current partner (number of sexual partners, number of ongoing sexual partners), lifetime engagement in sexual activity only with HITCH partner	Concurrent sexual activity with someone other than HITCH partner (number of sexual partners, number of ongoing sexual partners)
Contraceptive historya	Lifetime use of birth control methods (intrauterine device, hormonal contraceptive, condom, spermicides, diaphragm, cervical cap, sponge, vaginal douche, natural method, withdrawing or pulling out, emergency contraception such as morning-after-pill), age at first use of hormonal contraceptive, duration of use of hormonal contraceptives (months, years), birth control methods used with HITCH partner (similar list)	Use of birth control methods (similar list to baseline data)
Medical history	Number of Pap tests done,a date of last Pap test (month and year),a ever had a medical condition (trichomonas genital infection, venereal warts or condylomas or papillomavirus infection, chlamydia, genital herpes, syphilis, gonorrhea, ulcers or genital sores, HIV, hepatitis B, ureaplasma hominis, vaginal yeast infection,a bacterial vaginosisa), medical condition since the start of sexual relationship with HITCH partner, signs and symptoms since the start of sexual relationship with HITCH partner (painful or frequent urination, itching or burning sensation when urinating, blood in urine, abnormal discharge, sores in the genital area, unusually painful or heavy period,a vaginal itching or burning,a lower back pain not caused by physical exertion)a	Pap test done, date of last Pap test (month and year), medical conditions (similar list to baseline data), signs and symptoms (similar list to baseline data)
Knowledge of human papillomavirus (HPV)	Ever heard of HPV, true or false statements (HPV can cause cervical cancer in women; men can carry HPV; genital warts cause cervical cancer in women; HPV can be cured with antibiotics; a person may be infected with HPV and not know it; HPV can cause penile cancer in men; HPV causes genital herpes; condoms protect against HPV; having multiple sex partners increases one’s risk for HPV; regular Pap test can help to prevent complications from HPV; HPV is the most common sexually transmitted infection; a person can get HPV from sharing a plate or fork or glass with someone who has HPV, unprotected sexual intercourse with someone who has HPV, oral sex with someone who has HPV, kissing—with exchange of saliva—someone who has HPV, sharing a washroom or shower with someone who has HPV), chances of becoming infected with HPV, chances of developing cervical or penile cancer
HPV vaccine	Received the HPV vaccine (received part of participation in a clinical trial, number of injections, date of last injection), likelihood of choosing to be vaccinated if offered	Received the HPV vaccine (received part of participation in a clinical trial, number of injections, date of last injection), likelihood of choosing to be vaccinated if offered

^aQuestions were only asked in female respondents’ baseline questionnaires; for men, circumcision was evaluated by the nurse during the clinic visit.

^bN/A: not applicable.

^cQuestions were only asked in female respondents’ follow-up.

^dMen questionnaire also asked about the number of times of anal intercourse (per week, per month) and frequency of condom use during anal intercourse.