Table 4 Effects on NVP severity in the whole sample (above) and the two geographical sub-samples (below)

Whole sample

 OC use when met

3.62

0.86

1, 2277

0.355

0.000

 Age when pregnant

109.71

26.00

1, 2277

< .001

0.011

 Sex of child

14.75

3.50

1, 2277

0.062

0.001

 Country

381.23

90.34

1, 2277

< .001

0.038

 OC use when met x Sex of child

0.14

0.03

1, 2277

0.854

0.000

 OC use when met x Country

3.27

0.78

1, 2277

0.379

0.000

 Sex of child x Country

1.02

0.24

1, 2277

0.623

0.000

 OC use when met x Sex of child x Country

0.70

0.17

1, 2277

0.684

0.000

Czech Republic / Slovakia

 OC use when met

0.05

0.01

1, 920

0.904

0.000

 Age when pregnant

57.94

15.56

1, 920

<.001

0.017

 Sex of child

10.35

2.78

1, 920

0.096

0.003

 OC use when met x Sex of child

0.05

0.01

1, 920

0.905

0.000

UK / USA / Canada

 OC use when met

8.74

1.92

1, 1356

0.166

0.001

 Age when pregnant

58.20

12.78

1, 1356

<.001

0.009

 Sex of child

4.64

1.02

1, 1356

0.313

0.001

 OC use when met x Sex of child

0.84

0.18

1, 1356

0.668

0.000