Figure 4.

Sensitivity analysis for association of percent emphysema on CT scan and mean activity count in actigraphy. Activity counts in the thousands (n = 1,316). Analysis for the fully adjusted model includes age, sex, race/ethnicity, education, scanner manufacturer, height, weight, BMI category, cotinine, pack-years, and FEV₁. No interactions besides age (P = .0413) and site (P < .0001) were significant (all other P values > .05). ADA = American Diabetes Association; JNC VI = Sixth Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure; sO2 = oxygen saturation; MI = myocardial infarction.