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Table 2 Associations between reported rates of risk behaviours and age-ORs for one month increase in age when interviewed at each date (and significance of interactions between age and date, gender and 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

 

1990

2003

(p-value of AGE by DATE

Interaction)

(p-value of AGE by GENDER interaction)

(p-value of AGE by SOCIAL CLASS interaction)

 

OR

(95% CI)

p-value

OR

(95% CI)

p-value

   

Current smoker

1.03

(0.99-1.07)

0.089

1.02

(0.99-1.04)

0.061

(0.582)

(0.286)

(0.954)

Heavier smoking *

1.02

(0.98-1.06)

0.378

1.01

(0.98-1.04)

0.508

(0.710)

(0.044)

(0.220)

Excessive drinking †

0.99

(0.95-1.03)

0.668

0.99

(0.97-1.01)

0.491

(0.942)

(0.437)

(0.806)

Binge drinking ‡

0.99

(0.95-1.02)

0.479

0.99

(0.97-1.01)

0.315

(0.896)

(0.132)

(0.976)

Use of any drugs

1.03

(0.99-1.07)

0.084

1.01

(0.99-1.03)

0.359

(0.286)

(0.759)

(0.378)

Used any drug in the past year

1.03

(0.99-1.07)

0.115

0.99

(0.97-1.01)

0.279

(0.058)

(0.902)

(0.503)

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

1.03

(0.98-1.08)

0.257

0.97

(0.95-0.99)

0.024

(0.044)

(0.261)

(0.716)

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

1.03

(0.97-1.09)

0.337

1.02

(0.99-1.04)

0.225

(0.717)

(0.644)

(0.208)

Early sexual initiation #

N/A¶

N/A¶

N/A ¶

N/A ¶

N/A ¶

Three or more sexual partners ever

1.08

(1.04-1.13)

> 0.001

1.05

(1.03-1.07)

> 0.001

(0.188)

(0 < .001)

(0.892)

Two or more sexual partners last year

1.06

(1.02-1.11)

0.007

1.02

(0.99-1.04)

0.153

(0.064)

(0.564)

(0.273)

Ever (made) pregnant

1.08

(1.00-1.16)

0.046

1.06

(1.03-1.09)

0.000

(0.689)

(0.800)

(0.794)

  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 association with age when interviewed not applicable
  8. OR = odds ratio, CI = confidence interval, NA = not applicable
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BMC Public Health

ISSN: 1471-2458

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