Table 2  Overview of maternal findings part 1.

		Case groups		Control group		Significance (p value)*
		MW	SD	MW	SD
M = mean, SD = standard deviation, AED = antiepileptic drug) *  Statistical significance testing with one-way analysis of variance for the criterion age, and generalised linear models with age as an additional covariable for the other criteria (for details see text section statistical analysis). The p values for the multiple group comparisons are derived from a Dunnett comparison between the subgroup and the control group in each case.
Number of previous abortions on obstetric history	Case group total	0.33	0.69	0.24	0.60	0.015
	Depression	0.47	0.75			0.001
	Epilepsy	0.38	0.91			0.054
	Substance abuse/dependence	0	0			0.967
	Depression without antidepressants	0.51	0.83			0.002
	Depression with antidepressants	0.40	0.62			0.139
	Epilepsy without AED	0.33	0.49			0.313
	Epilepsy with AED	0.41	1.05			0.100
	Substance abuse without substitution	0	0			0.971
	Substance abuse with substitution	0	0			0.986
Age	Case group total	29.40	5.86	29.67	5.62	0.543
	Depression	31.23	4.93			0.043
	Epilepsy	28.87	6.29			0.765
	Substance abuse	24.83	5.89			< 0.001
	Depression without antidepressants	31.34	5.29			0.222
	Depression with antidepressants	31.07	4.38			0.675
	Epilepsy without AED	27.25	6.12			0.589
	Epilepsy with AED	29.59	6.34			1.000
	Substance abuse without substitution	24.11	5.88			< 0.001
	Substance abuse with substitution	28.25	5.32			0.997
Number of antenatal visits	Case group total	12.63	3.90	12.05	3.97	0.026
	Depression	13.75	3.94			< 0.001
	Epilepsy	11.45	3.29			0.323
	Substance abuse	10.70	3.64			0.198
	Depression without antidepressants	14.06	3.57			< 0.001
	Depression with antidepressants	13.21	4.51			0.112
	Epilepsy without AED	11.67	2.67			0.831
	Epilepsy with AED	11.35	3.59			0.294
	Substance abuse without substitution	10.41	3.73			0.145
	Substance abuse with substitution	12.33	3.21			0.888