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Table 3 Reported rates of risk behaviours at each date and age- and social class-adjusted ORs for 2003 compared with 1990.

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

 

1990

2003

1990

2003

Unadjusted

Adjusted for age

Adjusted for social class

Adjusted for age and social class

 

n/N

n/N

%

(95%CI)

%

(95%CI)

OR

(95% CI)

p-value

OR

(95% CI)

p-value

OR

(95% CI)

p-value

OR

(95% CI)

p-value

Current smoker

300/892

319/939

33.6

(30.6-36.8)

34.0

(31.0-37.1)

1.02

(0.84-1.23)

0.872

0.85

0.67-1.08)

0.181

1.02

(0.84-1.24)

0.825

0.88

(0.69-1.13)

0.323

Heavier smoking *

200/891

145/940

22.5

(19.8-25.3)

15.4

(13.3-17.9)

0.63

(0.50-0.80)

< 0.001

0.57

(0.42-0.77)

< 0.001

0.63

(0.50-0.80)

< 0.001

0.60

(0.44-0.81)

0.001

Excessive drinking †

183/892

301/926

20.5

(18.0-23.3)

32.5

(29.6-35.6)

1.87

(1.51-2.31)

< 0.001

1.99

(1.53-2.58)

< 0.001

1.87

(1.51-2.31)

< 0.001

1.96

(1.51-2.55)

< 0.001

Binge drinking ‡

308/891

427/927

34.6

(31.5-37.8)

46.1

(42.9-49.3)

1.62

(1.34-1.95)

< 0.001

1.76

(1.40-2.23)

< 0.001

1.62

(1.34-1.95)

< 0.001

1.77

(1.40-2.24)

< 0.001

Use of any drugs

291/892

553/941

32.6

(29.6-35.8)

58.8

(55.6-61.9)

2.94

(2.43-3.56)

< 0.001

2.62

(2.07-3.31)

< 0.001

2.95

(2.44-3.58)

< 0.001

2.66

(2.10-3.37)

< 0.001

Used any drug in the past year

216/891

375/940

24.2

(21.5-27.2)

39.9

(36.8-43.1)

2.07

(1.69-2.53)

< 0.001

2.11

(1.65-2.70)

< 0.001

2.07

(1.69-2.53)

< 0.001

2.09

(1.63-2.68)

< 0.001

Used cannabis only in the past year (cannabis only) ^

128/890

230/941

14.4

(12.2-16.8)

24.4

(21.8-27.3)

1.92

(1.51-2.44)

< 0.001

2.19

(1.64-2.93)

< 0.001

1.92

(1.51-2.43)

< 0.001

2.13

(1.59-2.85)

< 0.001

Used any other drug in the past year ('other drugs') ~

87/891

146/941

9.8

(8.0-11.9)

15.5

(13.4-18.0)

1.69

(1.28-2.25)

< 0.001

1.46

(1.03-2.06)

0.033

1.70

(1.28-2.26)

< 0.001

1.49

(1.05-2.11)

0.024

Early sexual initiation #

139/889

267/938

15.6

(13.4-18.2)

28.5

(25.7-31.4)

2.15

(1.71-2.71)

< 0.001

N/A ¶

2.19

(1.74-2.76)

< 0.001

N/A ¶

Three or more sexual partners ever

212/887

464/925

23.9

(21.2-26.8)

50.2

(46.9-53.4)

3.21

(2.63-3.93)

< 0.001

2.15

(1.68-2.74)

< 0.001

3.31

(2.70-4.05)

< 0.001

2.28

(1.78-2.92)

< 0.001

Two or more sexual partners last year

158/890

331/934

17.8

(15.4-20.4)

35.4

(32.4-38.6)

2.54

(2.04-3.16)

< 0.001

2.11

(1.62-2.75)

< 0.001

2.57

(2.06-3.19)

< 0.001

2.18

(1.67-2.85)

< 0.001

Ever (made) pregnant

53/886

81/935

6.0

(4.6-7.7)

8.7

(7.0-10.6)

1.51

(1.05-2.16)

0.026

0.90

(0.57-1.41)

0.643

1.53

(1.07-2.20)

0.021

0.97

(0.61-1.53)

0.885

  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 adjustment for age when interviewed not applicable
  8. OR = odds ratio for increase in behaviour rate between 1990 and 2003, CI = confidence interval, N/A = not applicable
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BMC Public Health

ISSN: 1471-2458

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