Table 4.

Logistic regression model evaluating the odds of earlier age at menopause among the study population of US women age 25-50 years

	Race-Ethnic Subgroup
	Whites (n=943)		Black (n=988)		Hispanic (n=881)
Independent Variable	OR	95% CI	OR	95% CI	OR	95% CI
Age (years)	1.38	1.27-1.49	1.30	1.21-1.38	1.41	1.28-1.54
BMI	0.99	0.93-1.05	1.00	0.96-1.04	1.07	0.99-1.16
Education
< 12 years versus 12 years	1.18	0.50-2.76	1.10	0.50-2.40	2.06	0.98-4.33
> 12 years versus 12 years	0.60	0.27-1.30	0.88	0.48-1.63	0.99	0.25-3.97
< 12 years versus > 12 years	0.51	0.39-1.66	0.80	0.39-1.66	0.48	0.18-1.27
Smoking Status*
Smoker versus no SHS exposure	2.34	0.70-7.82	12.34	3.03-50.21	6.80	1.92-24.11
SHS exposed vs. non-SHS exposed	1.25	0.41-3.78	6.65	1.45-30.40	19.08	5.96-61.07
Smoker vs. SHS-exposed	1.87	1.08-3.24	1.86	0.99-3.50	0.36	0.18-0.70
Employment Status
Employed	1.38	0.65-2.93	0.73	0.39-1.35	0.80	0.31-2.04
Not Employed	1.00		1.00

^*SHS-exposed and non-SHS exposed categories are both non-smoking