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. 2018 Dec 17;13(12):e0207856. doi: 10.1371/journal.pone.0207856

Table 1. The descriptive statistics on background and study variables in the subgroups of mothers and fathers.

P values and Cohen’s d’s are given for the differences between mothers and fathers.

Mothers Fathers
N = 3202 N = 2076
N (total) = 5278 Mean (SD) Mean (SD) p< Cohen's d ****
Age 30.92 (4.56) 32.60 (5.33) .001*
Marital status (%)
    In relationship 90.9 89.9
    Missing 7.6 9.7
Parents living together 93.0
Education (%)
    Primary school 2.9 4.6
    Secondary 33.1 41.2
    University 55.2 46.2
    Higher 4.1 2.6
    Missing 4.7 5.4
Parity (%)
    Nulliparous 49.1 NA
    Multiparous 45.9 NA
    Missing 5.1 NA
SSRIs medication (%) 3.1# 2.1##
Smoking 14.2#
Anxiety (SCL)
    14 gwks 3.31 (3.91) 2.45 (3.48) .001*** 0.22
    24 gwks 3.92 (4.26) 2.66 (3.81) .001*** 0.31
    34 gwks 3.24 (4.00) 1.94 (3.20) .001*** 0.36
Depression (EPDS)
14 gwks 5.17 (4.02) 3.74 (3.42) .001*** 0.38
    24 gwks 5.00 (4.12) 3.50 (3.47) .001*** 0.40
34 gwks 4.91 (4.10) 3.13 (3.38) .001*** 0.47

* t-test

** χ2 -test

***logistic regression

**** , #3rd pregnancy trimester

## 1st pregnancy trimester

Cohen`s d effect size d > .20 = small; d > .50 = medium; d > .80 = large.