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. 2024 Oct 23;19(10):e0311619. doi: 10.1371/journal.pone.0311619

Fig 2. Association between WWI and lung functions for Model III.

Fig 2

Adjusted for age, sex, race/ethnicity, BMI, PIR, weight, HDL, LDL, triglyceride, total cholesterol, serum cotinine levels, physical activity, smoking status, alcohol consumption, asthma, coronary heart disease, congestive heart failure, stroke, diabetes mellitus, and hypertension. The solid crimson line signifies the smooth curve fitting among the variables. Azure bands indicate the 95% confidence interval stemming from the fit. WWI: Weight-adjusted waist index; FEV1: Forced expiratory volume in 1 s; FVC: Forced vital capacity; FEV1/FVC: Ratio of FEV1 to FVC; PEF: Peak expiratory flow rate; FEF 25–75%: Forced expiratory flow between 25 and 75% of FVC.