Table 2.

Demographics of individuals with a chronic tic disorder exposed and unexposed to pre- and perinatal complications^a

Variable	Exposed individuals			Unexposed individuals
	N	%		N	%		OR	95% CI OR	χ2	Pb
Matched sample size
At least one pregnancy complication	150	100%		150	100%
At least one delivery complication	170	100%		204	100%
At least one neonatal complication	203	100%		288	100%
Participants <18 years old
At least one pregnancy complication	95	63.3		99	66.0		0.89	0.55–1.43	0.23	0.72
At least one delivery complication	95	55.9		113	55.4		1.02	0.68–1.54	0.01	1
At least one neonatal complication	148	72.9		210	72.9		0.99	0.67–1.49	<0.01	1
Male
At least one pregnancy complication	103	68.7		102	68.0		0.97	0.59–1.58	0.02	1
At least one delivery complication	106	62.4		133	65.2		1.13	0.74–1.73	0.32	0.59
At least one neonatal complication	143	70.4		204	70.8		1.02	0.69–1.51	0.01	1
Race white
At least one pregnancy complication	146	97.3		141	94.0		2.33	0.70–7.74	2.01	0.26
At least one delivery complication	161	94.7		193	94.6		1.02	0.41–2.52	<0.01	1
At least one neonatal complication	189	93.1		270	93.8		0.90	0.44–1.85	0.08	0.85
	Mean	SD	Range	Mean	SD	Range		df	t	P
Mean age in years
At least one pregnancy complication	20.3	13.6	6–68	20.3	13.7	6–66		298	−0.04	0.97
At least one delivery complication	24.2	16.8	3–74	24.3	16.9	6–76		372	0.05	0.96
At least one neonatal complication	17.6	12.5	3–65	17.8	12.5	4–66		489	0.14	0.89
SESc
At least one pregnancy complication	5.15	1.36	1–7	5.18	1.32	1–7		289	0.24	0.81
At least one delivery complication	4.95	1.38	1–7	4.83	1.43	1–7		359	−0.81	0.42
At least one neonatal complication	5.31	1.28	1–7	5.12	1.33	1–7		476	−1.52	0.13

df, degrees of freedom; SES, socioeconomic status

^aGroups were propensity matched on age and sex

^bComparisons were done using Pearson’s chi-square test with one degree of freedom

^cBased on parents’ education level (1= less than 7 years of schooling to 7= graduate/professional degree)