TABLE 4

Risk Factors for Induced Abortion (Therapeutic and Elective) and Miscarriage Among 595 Women After Thyroid Surgery, Adjusted for Age at Pregnancy

	Induced abortions		Miscarriages
Risk factor	OR	95% CI	OR	95% CI
Cumulative ¹³¹I^* activity (for 37 MBq)	0.998	0.996–1	1.0004	0.999–1.002
Alcohol intake vs. no alcohol intake^†	2.43	1.73–3.40	1.27	0.68–2.37
Smoking habit vs. no smoking habit^†	3.21	2.37–4.34	1.04	0.68–1.61
Low socioeconomic status vs. high socioeconomic status^†	0.71	0.90–1.99	1.58	0.84–2.98
Medications vs. no medications^†	0.67	0.429–1.05	0.75	0.32–1.75
Dose during last year before pregnancy (MBq)
3.7–370 vs. <3.7	1.75	1.08–2.82	1.10	0.63–1.91
More than 370 < 3.7	5.74	2.79–11.8	0.53	0.15–1.91