Figure 1.
Hazard ratios and 95% CIs for risk of first stroke by own and spousal smoking status among married HRS participants aged ≥50 years. Numbers in parentheses are the number of events/person-years of follow-up. Estimates are covariate-adjusted as described in the text. CIs are based on clustered bias-corrected bootstrap with 1000 resamples.
HRS, Health and Retirement Study