Table 4.

Hazard Ratios and 95% CIs for the Association Between Fatal CHD^a and a 10-μg/m³ Change in Average Predicted PM₁₀ in the 12 Months Prior to Death Stratified by Body Mass Index^b for the US Nurses’ Health Study During the Follow-up Period 1992–2002

	Body Mass Index <30		Body Mass Index ≥30
No. of casesc	310		149
No. of person-months	432,557		132,250
	Hazard Ratio	95% CI	Hazard Ratio	95% CI
Base modeld	1.20	0.86, 1.68	2.16	1.35, 3.45
Adjusted modele	1.08	0.76, 1.52	1.99	1.23, 3.22

Abbreviations: CHD, coronary heart disease; CI, confidence interval; PM₁₀, particulate matter <10 μm in diameter.

^aIncluding sudden deaths.

^bWeight (kg)/height (m)².

^cRisks are based on complete information for participants.

^dModeled stratifying by age in months, adjusting for state of residence, year, and season.

^eModeled stratifying by age in months, adjusting for state of residence, year, season, smoking status, family history of myocardial infarction, high cholesterol level, diabetes, hypertension, median family income in the census tract of residence, physical activity, and median house value in the census tract of residence.