Table 2. Logistic Regression of Model of Tics vs. No Tics (Dependent Variable).

	Adjusted Odds Ratio (95% CI)	p-Value
Cesarean section	5.78 (1.60–20.91)	0.007
Prenatal smoking exposure	3.07 (1.24–7.60)	0.01
Neonatal respiratory syndrome	1.21 (0.325.61)	0.77
Prenatal infection	2.84 (0.40–19.84)	0.29

Abbreviation: CI, Confidence Interval.

The logistic regression model was adjusted for family history of tics, body mass index, and presence of any coexistent comorbid neuropsychiatric disturbances.

The model fitness was adequate (Nagelke R², p = 0.28; Hosmer–Lemeshow, p = 0.67). This model classified 73.4% of the population (55.1% with tics and 85.3% without tics).