Table 3.

Factors affecting the incidence of abortion

Factors	Odd ratio	95% CI	P
BHCG	0.11	0.019-0.647	0.015
NT	4.25	1.01-17.94	0.041
Needle insertion	1.05	0.91-3.74	0.076
Maternal age	0.90	0.65-1.26	0.539
Gestational age	0.692	0.21-2.22	0.534
Parity	0.686	0.06-7.85	0.763

Logistic regression Test