Table 1.

Logistic regression results for the sample with no missing data and the total sample with missing data imputed: Significant predictors of study withdrawal in the first year after enrollment in the TEDDY general population

		Sample with No Missing Data (N=3431)						Sample with missing data imputed (N=3757)
Predictor variable		β	SE	p-value	OR	95% Confidence Interval		β	SE	p-value
Intercept		1.126	0.424	0.008				0.982	0.400	0.014
Country	United States	ref						ref
	Finland	−0.420	0.130	0.001	0.657	0.509	0.848	−0.431	0.123	0.0004
	Germany	0.278	0.222	0.211	1.321	0.854	2.042	0.154	0.218	0.481
	Sweden	−0.342	0.110	0.002	0.711	0.572	0.882	−0.346	0.104	0.002
Child sex female	No	ref
	Yes	0.160	0.092	0.081	2.316	1.840	2.915	0.217	0.086	0.012
Maternal age (years)		−0.058	0.009	<0.0001	0.944	0.927	0.961	−0.053	0.009	<0.0001
Maternal Lifestyle Behaviors during Pregnancy
Smoked	No	ref						ref
	Yes	0.841	0.117	<0.0001	2.318	1.841	2.918	0.803	0.117	<0.0001
Alcohol  consumption   in last   trimester	None	ref
	1–2 times/month	−0.343	0.148	0.020	0.709	0.531	0.948	−0.280	0.140	0.045
	>2 times/month	−0.424	0.319	0.183	0.654	0.350	1.222	−0.401	0.299	0.180
Worked all   trimesters	No	ref						ref
	Yes	−0.396	0.095	<0.0001	0.673	0.559	0.811	−0.364	0.090	<0.0001
Dad participation	No	ref						ref
	Yes	−0.569	0.162	0.0005	0.566	0.412	0.778	−0.608	0.146	<0.0001
Risk perception	Underestimate	ref						ref
	Accurate	−1.257	0.375	0.0008	0.284	0.137	0.593	−1.032	0.354	0.004
State Anxiety Inventory score		0.001	0.006	0.835	1.001	0.989	1.014	0.001	0.006	0.825
State Anxiety Inventory score×risk perception		0.023	0.009	0.011	1.023	1.005	1.041	0.018	0.009	0.039
>1 missing data points								1.321	0.464	0.007