Table 1

Background characteristics of the women
Study group Non-study group †† P*
n (%) n (%)
Woman (n) 995 5286
Age, mean, years (SD) 30.8(4.503) 30.0(5.199) <0.001
min 17.1-max 44.0 min 14.9-max 49.5
Civil status
 Married 600(60.3) 2848(53.9) 0.001
 Unmarried 389(39.1) 2387(45.2)
 Other 6(0.6) 51(1.0)
Occupation
 Professional occupation 165(16.6) 536(10.1) <0.001
 Service occupation 85(8.5) 390(7.4)
 Worker 32(3.2) 170(3.2)
 Other/unknown 713(71.7) 4190(79.3)
Number of deliveries
 0 541(54.4) 2324(44.0) <0.001
 1 306(30.8) 1877(35.5)
 2 or more 148(14.9) 1085(20.5)
Abortions
 Yes 124(12.5) 781(14.8) 0.059
 No 869(85.2) 4501(85.2)
Gestational age (days) mean (SD) 278.0(12.966) 278.0(13.526) 0.949
Delivery
 Vaginal 769(77.3) 4085(77.3) 0.416
 Breech birth 14(1.4) 48(0.9)
 Vacuum or forceps  extraction 78(7.84) 458(8.7)
 Section 134(13.5) 695(13.2)
Baby’s birth weight (g) mean (SD) 3486.8(550.9) 3513.1(567.8) 0.179
min 420-max 5350 min 230-max 6040

Information gathered from the Finnish Medical Birth Register.

†) Women who participated in the STEPS-study and had their first visit at a maternity health clinic in the area of Turku University Hospital 1.1.2008–31.5.2009.

††) Women who had their first visit at a maternity health clinic in the area of Turku University Hospital 1.1.2008–31.5.2009, but who were not included in the study group.

*) Used statistical test: Pearson’s Chi-Square and T-test for independent samples.

Tuominen et al.

Tuominen et al. BMC Pregnancy and Childbirth 2012 12:96   doi:10.1186/1471-2393-12-96

Open Data