Table 1.
Characteristics of the study population in Capital Region of Denmark in 2010, 2013 and 2017. Only persons with information on smoking and stress are included
| Characteristics | Tobacco only use (N=2732) | Alcohol and tobacco co-use (N=4602) | t or χ2 | p |
|---|---|---|---|---|
| Age (years), Mean (SD) | 45.20 (13.16) | 40.52 (11.99) | ||
| Age (years), n (%) | χ2=196.02 | <0.00001b | ||
| 13–20 | 35 (1.28) | 122 (2.65) | ||
| 21–40 | 1073 (39.30) | 2384 (51.80) | ||
| 41–60 | 1215 (44.47) | 1759 (28.22) | ||
| >60 | 391 (14.30) | 304 (6.61) | ||
| missing | 18 (0.65) | 33 (0.72) | ||
| Gender, n (%) | χ2=42.53 | <0.00001b | ||
| Male | 1984 (72.62) | 3648 (79.27) | ||
| Female | 748 (27.38) | 954 (20.73) | ||
| Marital status, n (%) | χ2=45.19 | <0.00001b | ||
| Married/cohabiting | 1627 (59.60) | 2649 (57.60) | ||
| Single | 714 (26.10) | 1505 (32.70) | ||
| Separated/widowed/divorced | 334 (12.20) | 406 (8.80) | ||
| Missing | 57 (2.09) | 42 (0.91) | ||
| Education level*, n (%) | χ2=68.44 | <0.00001b | ||
| Illiterate | 9 (0.33) | 9 (0.20) | ||
| Primary | 257 (9.37) | 258 (5.61) | ||
| Secondary | 1560 (57.10) | 2862 (62.19) | ||
| Post-Secondary | 283 (10.36) | 582 (12.64) | ||
| University | 231 (8.46) | 578 (12.56) | ||
| Missing | 392 (14.35) | 313 (6.80) | ||
| Monthly income** (HK), n (%) | N=2159 | N=3765 | χ2=103.17 | <0.0001b |
| <10000 | 481 (22.28) | 563 (14.95) | ||
| 10000–19999 | 902 (41.78) | 1762 (46.80) | ||
| 20000–29999 | 344 (15.93) | 870 (23.10) | ||
| ≥30000 | 432 (20.01) | 570 (15.15) | ||
| Missing | 573 (20.97) | 837 (18.19) | ||
| Cigarettes/day, Mean (SD) | 18.62 (9.13) | 18.14 (8.75) | t=2.19 | p=0.0282b |
| Fagerström score, Mean (SD) | 5.32 (2.37) | 5.23 (2.42) | t=1.67 | p=0.0956 |
| Confidence score, Mean (SD) | 63.62 (25.56) | 60.79 (22.79) | t=4.86 | p<0.0001b |
| Importance score, Mean (SD) | 81.58 (18.32) | 80 (18.62) | t=3.49 | p=0.0005b |
| Difficulty score, Mean (SD) | 73.23 (23.58) | 74.82 (25.26) | t=-2.654 | p=0.008b |
| History of mental illness***, n (%) | 485 (17.75) | 487 (10.58) | χ2=79.00 | p<0.0001b |
| Feeling depressed in the past 2 weeks, n (%) | 639 (23.38) | 1084 (23.55) | χ2=0.07 | p=0.936 |
| Number of previous quit attempts, Mean (SD) | 1.46 (2.84) | 1.52 (2.80) | t=0.8565 | p=0.3918 |
| Current substance use, n (%) | 7 (0.26) | 16 (0.35) | χ2=0.46 | p=0.498 |
| AUDIT scorea , n (%) | N=2732 | N=4602 | NA | |
| 0 | 2732 (100) | NA | ||
| 1–8 | NA | 3427 (74.50) | ||
| 9–15 | NA | 800 (17.40) | ||
| 16–19 | NA | 200 (4.34) | ||
| ≥20 | NA | 173 (3.76) | ||
| Mean (SD) | NA | 6.17 (5.67) |
*
Missing data on education: 313 for drinker and 392 for non-drinker.
**
Missing data on income: 573 for non-drinker and 837 for drinker.
***
Missing data on mental illness: 33 for drinker and 37 for non-drinker.
a
Missing data on AUDIT score: 2.
b
p<0.05 is statistically significant.
HK: 1000 Hong Kong dollars about 130 US$. NA: not applicable.