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Table 5 Reported rates of risk behaviours at each date and age- and gender-adjusted ORs for 2003 compared with 1990, by social class.

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

  NON-MANUAL MANUAL Age- and gender-adjusted odds ratio for 2003 compared with 1990 (p-value of SOCIAL CLASS by DATE interaction-age and gender adjusted)
  1990 2003   1990 2003   NON-MANUAL MANUAL  
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 30.5
(26.0 - 35.4)
25.7
(21.7 - 30.2)
0.137 36.0
(31.9 - 40.4)
40.4
(36.3 - 44.7)
0.150 0.60
(0.41-0.89)
0.011 1.13
(0.83-1.56)
0.437 (0.058)
Heavier smoking * 16.6
(13.2 - 20.8)
11.8
(9.1 - 15.3)
0.055 26.7
(23.0 - 30.8)
18.2
(15.2 - 21.7)
0.001 0.52
(0.31-0.86)
0.011 0.63
(0.43-0.91)
0.015 (0.737)
Excessive drinking 23.7
(19.7 - 28.3)
32.4
(28.0 - 37.0)
0.007 18.0
(14.9 - 21.6)
32.6
(28.6 - 36.7)
< 0.001 1.48
(1.00-2.19)
0.049 2.52
(1.74-3.64)
< 0.001 (0.047)
Binge drinking 36.0
(31.2 - 41.0)
44.4
(39.7 - 49.3)
0.016 33.5
(29.5 - 37.8)
47.4
(43.1 - 51.7)
< 0.001 1.40
(0.98-2.01)
0.068 2.11
(1.53-2.92)
< 0.001 (0.108)
Use of any drugs 32.4
(27.8 - 37.4)
54.6
(49.8 - 59.3)
< 0.001 32.8
(28.8 - 37.1)
62.1
(57.8 - 66.1)
< 0.001 2.36
(1.65-3.39)
< 0.001 3.03
(2.19-4.20)
< 0.001 (0.102)
Used any drug in the past year 26.2
(21.9 - 30.9)
40.4
(35.8 - 45.2)
< 0.001 23.0
(19.5 - 26.9)
39.5
(35.4 - 43.7)
< 0.001 2.04
(1.40-2.98)
< 0.001 2.18
(1.55-3.08)
< 0.001 (0.373)
Used cannabis only in the past year ('cannabis-only') ^ 15.5
(12.2 - 19.6)
28.6
(24.4 - 33.1)
< 0.001 13.6
(10.9 - 16.9)
21.1
(17.8 - 24.7)
0.002 2.48
(1.62-3.80)
< 0.001 1.82
(1.21-2.73)
0.004 (0.391)
Used any other drug in the past year ('other drugs') ~ 10.6
(7.9 - 14.2)
11.8
(9.1 - 15.3)
0.594 9.1
(6.9 - 12.0)
18.4
(15.3 - 21.9)
< 0.001 0.98
(0.56-1.70)
0.933 1.97
(1.24-3.13)
0.004 (0.015)
Early sexual initiation # 11.8
(8.8 - 15.5)
21.7
(17.9 - 25.9)
< 0.001 18.5
(15.3 - 22.1)
33.8
(29.9 - 37.9)
< 0.001 2.05
(1.39-3.03)
< 0.001 2.30
(1.71-3.08)
< 0.001 (0.630)
Three or more sexual
partners ever
19.1
(15.4-23.3)
42.2
(37.6-47.1)
< 0.001 27.5
(23.8-31.5)
56.5
(52.2-60.8)
< 0.001 2.17
(1.47-3.20)
< 0.001 2.48
(1.77-3.49)
< 0.001 (0.613)
Two or more sexual
partners last year
15.0
(11.8-18.9)
31.5
(27.2-36.1)
< 0.001 19.8
(16.6-23.5)
38.5
(34.4-42.7)
< 0.001 2.00
(1.31-3.05)
0.001 2.40
(1.66-3.46)
< 0.001 (0.940)
Ever (made) pregnant 3.0
(1.7 - 5.3)
5.6
(3.7 - 8.2)
0.080 8.2
(6.1 - 10.9)
11.1
(8.7 - 14.1)
0.113 1.77
(0.74-4.26)
0.201 0.79
(0.46-1.37)
0.409 (0.266)
  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. # Defined as sexual intercourse at age < 16 years
  7. Data on early sexual initiation collected retrospectively so age adjustment not applicable; adjusted for gender only.
  8. OR = odds ratio for increase in behaviour rate between 1990 and 2003, CI = confidence interval