. 1998 Jun;42(6):1336–1339. doi: 10.1128/aac.42.6.1336

TABLE 2.

Pregnancy outcome for women exposed to fluoroquinolones during pregnancy compared to that for controls exposed to nonteratogenic antibiotics

Outcome or characteristic	No. of women with the following outcome/ total no. of women:		Relative risk (95% confidence interval)	P value
Outcome or characteristic	Quinolone group	Nonteratogenic antibiotic group	Relative risk (95% confidence interval)	P value
Live births	173/200	188/200	0.92 (0.86–0.98)	0.02^a
Spontanous abortion	18/200	10/200	1.80 (0.85–3.80)	0.17^a
Therapeutic abortion	9/200	2/200	4.50 (0.98–20.57)	0.06^a
Vaginal delivery	145/173	148/188	1.06 (0.96–1.18)	0.27^a
Premature birth	11/173	13/188	0.92 (0.42–2.00)	0.99^a
Birth weight, <2,500 g	7/173	9/188	0.85 (0.32–2.22)	0.93^a
Fetal distress	22/173	27/188	0.89 (0.52–1.49)	0.76^a
Delivery by cesarean section	28/173	40/188	0.83 (0.61–1.13)	0.21^a
Gestational age	39.3 ± 2.0^b	39.8 ± 2.0^b		0.02^c
Birth weight	3,452 ± 537^d	3,477 ± 608^d		0.92^c

χ² test (with Yates correction).

Units are in weeks of gestation.

Mann-Whitney rank sum test.

Units are in grams.