Figure 2.
Stratified analysis error bar plot by BMI. BMI was categorized using the WHO criteria: underweight (<18.5kg m−2), normal weight (18.5–24.9 kg m−2), overweight (25.0–29.9 kg m−2), and obesity (≥30.0kg m−2). Stratified BFP according to BMI. Each stratification was modeled using GEE. The estimated change in semen quality and 95% CI of each index of semen quality was calculated for each 10% increase in total BFP and local fat percentage in different stratified populations. BFP: body fat percentage; BMI: body mass index; GEE: generalized estimating equation model; WHO: World Health Organization; CI: confidence intervals.