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Table 4 Reported rates of risk behaviours at each date and age- and social class-adjusted ORs for 2003 compared with 1990, by gender.

From: Changes in the socio-demographic patterning of late adolescent health risk behaviours during the 1990s: analysis of two West of Scotland cohort studies

  MALES FEMALES Age- and social class-adjusted odds ratio for 2003 compared with 1990 (p-value of GENDER by DATE interaction-age and social class adjusted)
  1990 2003   1990 2003   MALES FEMALES  
Risk behaviour %
(95% CI)
%
(95% CI)
p-value %
(95% CI)
%
(95% CI)
p-value OR
(95% CI)
p-value OR
(95% CI)
p-value  
Current smoker 33.2
(28.9-37.8)
35.1
(30.9-39.5)
0.549 34.0
(29.9-38.4)
33.0
(28.9-37.5)
0.747 0.89
(0.62-1.25)
0.492 0.88
(0.62-1.24)
0.464 (0.447)
Heavier smoking * 22.3
(18.6-26.6)
19.4
(16.1-23.2)
0.276 22.6
(19.0-26.5)
11.3
(8.7-14.5)
< 0.001 0.79
(0.52-1.18)
0.249 0.43
(0.27-0.67)
< 0.001 (0.005)
Excessive drinking 31.8
(27.5-36.3)
38.3
(34.0-42.8)
0.041 10.4
(8.0-13.5)
26.5
(22.6-30.7)
< 0.001 1.26
(0.89-1.77)
0.197 3.81
(2.47-5.87)
< 0.001 (< 0.001)
Binge drinking 49.6
(44.9-54.4)
51.8
(47.3-56.3)
0.518 21.1
(17.6-25.0)
40.3
(35.9-44.8)
< 0.001 1.08
(0.78-1.50)
0.644 3.06
(2.14-4.38)
< 0.001 (< 0.001)
Use of any drugs 43.9
(39.3-48.7)
66.3
(62.0-70.4)
< 0.001 22.6
(19.0-26.5)
50.9
(46.3-55.4)
< 0.001 2.15
(1.53-3.01)
< 0.001 3.40
(2.40-4.80)
< 0.001 (0.084)
Used any drug in the past year 35.3
(30.9-40.0)
49.7
(45.2-54.1)
< 0.001 14.4
(11.6-17.9)
29.8
(25.8-34.1)
< 0.001 1.73
(1.24-2.41)
0.001 2.75
(1.85-4.08)
< 0.001 (0.123)
Used cannabis only in the past year ('cannabis-only') ^ 19.8
(16.2-23.8)
29.0
(25.1-33.2)
0.001 9.6
(7.2-12.6)
19.6
(16.2-23.4)
< 0.001 1.92
(1.31-2.81)
0.001 2.43
(1.53-3.85)
< 0.001 (0.190)
Used any other drug in the past year ('other drugs') ~ 15.4
(12.3-19.2)
20.6
(17.3-24.5)
0.044 4.7
(3.1-7.0)
10.0
(7.6-13.1)
0.002 1.12
(0.73-1.72)
0.616 2.53
(1.35-4.73)
0.004 (0.165)
Early sexual initiation # 24.8
(20.9-29.1)
30.3
(26.4-34.6)
0.063 7.5
(5.4-10.2)
26.5
(22.7-30.7)
< 0.001 1.38
(1.02-1.86)
0.038 4.54
(3.03-6.80)
< 0.001 (< 0.001)
Three or more sexual partners ever 41.2
(36.5-45.9)
54.6
(50.1-59.1)
< 0.001 8.5
(6.3-11.4)
45.7
(41.2-50.2)
< 0.001 1.19
(0.85-1.67)
0.319 6.31
(4.12-9.67)
< 0.001 (< 0.001)
Two or more sexual
partners last year
29.9
(25.8-34.5)
44.1
(39.7-48.6)
< 0.001 6.8
(4.9-9.5)
26.4
(22.5-30.6)
< 0.001 1.34
(0.94-1.90)
0.101 5.24
(3.25-8.44)
< 0.001 (< 0.001)
Ever (made) pregnant 3.1
(1.8-5.2)
5.3
(3.6-7.7)
0.110 8.6
(6.4-11.5)
12.2
(9.5-15.5)
0.071 1.37
(0.58-3.20)
0.472 0.87
(0.50-1.51)
0.623 (0.590)
  1. * Defined as smoking 70+ cigarettes a week
  2. Defined as ≥22 units in the past week for men and ≥15 units in the past week for women
  3. Defined as ≥9 units on any day in the past week for men and ≥7 units on any day in the past week for women
  4. ^Defined as cannabis and no other drugs
  5. ~ Defined as any other drug(s) (with or without cannabis)
  6. # Defiined as sexual intercourse at age < 16 years
  7. Data on early sexual initiation collected retrospectively so age adjustment not applicable; adjusted for social class only.
  8. OR = odds ratio for increase in behaviour rate between 1990 and 2003, CI = confidence interval