Table 2

Descriptive statistics of the intervention and control group (n=5 28 334)

CharacteristicsIntervention group (n=72 110) (n (%))Control group (n=456 224) (n (%))p Value
Sex
 Males37 612 (52.2)234 187 (51.3)<0.001
 Females34 498 (47.8)222 037 (48.7)
Age*17.0±1.717.0±1.7
Country of birth
 Sweden70 722 (98.1)446 771 (97.9)0.010
 Outside of Sweden1388 (1.9)9453 (2.1)
Maternal age at birth
 <204975 (6.9)32 238 (7.1)<0.001
 20–2417 680 (24.5)114 519 (25.1)
 25–2921 568 (29.9)135 129 (29.6)
 30–3415 880 (22.0)97 429 (21.4)
 35–399216 (12.8)57 640 (12.6)
 >402791 (3.9)19 269 (4.2)
Parental educational level†‡
 Primary43 663 (60.6)274 858 (60.3)<0.001
 Secondary18 836 (26.1)114 573 (25.1)
 University and above5171 (7.2)36 054 (7.9)
 Missing4440 (6.2)30 739 (6.7)
Parental SEI† ‡
 High non-manual4200 (5.8)28 097 (6.2)<0.001
 Middle non-manual12 052 (16.7)79 232 (17.4)
 Low non-manual11 774 (16.3)69 464 (15.2)
 Self-employed/farmer5133 (7.1)40 915 (9.0)
 Skilled workers20 731 (28.8)125 252 (27.5)
 Unskilled workers12 823 (17.8)76 320 (16.7)
 Others, not classified5116 (7.1)34 942 (7.7)
 Missing281 (0.4)2 002 (0.4)
Parents alcohol-related health problems5596 (7.8)29 800 (6.5)<0.001
Population density of locality†§<0.001
 ≥99 999 inhabitants34 538 (47.9)96 606 (21.2)
 50 000–99 999 inhabitants4210 (5.8)68 049 (14.9)
 20 000–49 999 inhabitants4674 (6.5)59 467 (13.0)
 10 000–19 999 inhabitants3476 (4.8)48 801 (10.7)
 5000–9999 inhabitants4509 (6.3)23 374 (5.1)
 2000–4999 inhabitants5170 (7.2)35 130 (7.7)
 1000–1999 inhabitants1662 (2.3)18 459 (4.1)
 500–999 inhabitants1707 (2.4)13 752 (3.0)
 200–499 inhabitants1239 (1.7)12 205 (2.7)
 Area not defined as a locality10 925 (15.2)80 381 (17.6)
Outcome, incidence of
 Alcohol-related morbidity (1973–2013)3977 (5.5)23 322 (5.1)
 Alcohol-related mortality (1971–2013)827 (1.1)4582 (1.0)
  • *Mean age (with SD) when the policy change was initiated (1 November 1967).

  • †Population and Housing Censuses.30

  • ‡Paternal or maternal, whichever highest.

  • §A locality is defined by Statistics Sweden as an a urban area where houses are no more than 200 m apart and with at least 200 inhabitants regardless of municipal or regional boundaries.

  • SEI, socioeconomic index.