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Table 1
Characteristics of the study sample of first-time fathers (n = 14 832) compared with all first-time fathers in Norway (n = 211 762)
	Study sample		All first-time fathers in Norway*
	n	%	n	%	p-value**
Age groups					<0.001
25-34 years	11 363	76.6	163 063	77.0
35-39 years	2 693	18.2	34 291	16.2
≥40 years	776	5.2	14 408	6.8
Mother tongue other than Norwegian	1 016	6.9	46 293	21.9	<0.001
Education					<0.001
Primary school	288	2.0	29 511	13.9
Secondary school	4 862	33.7	87 850	41.5
Higher education ≤4 years	4 301	29.8	53 193	25.1
Higher education >4 years	4 984	34.5	27 635	13.1
Unknown	397	2.7	13 573	6.4

*Data from the Norwegian Medical Birth Register.

**P-value for differences between the first-time fathers in the study sample and first-time fathers in Norway 2005-2008.

Nilsen et al. BMC Pregnancy and Childbirth 2013 13:29 doi:10.1186/1471-2393-13-29

Table 1