Fig. 2: Cumulative exposure–response between ambient temperature and nightly obstructive sleep apnea (OSA) status per location.
From: Global warming may increase the burden of obstructive sleep apnea
a Exposure-response curves between temperature and the risk ratio (RR) for nightly OSA (solid green) or nightly severe OSA (dashed purple). Shaded area represents 95%CI. Distribution of temperature (histogram) and temperature at the 99th percentile (T99; dashed black line) are also highlighted. b Subgroup analyses including the mean RR (and 95%CI) for nightly OSA at T99 based on the country of residence’s gross domestic product (GDP) per capita (tertiles – N, tertile 1 :40152; tertile 2: 37722; tertile3: 38468). c RR for nightly OSA at T99 by geographical location. d Country by country analysis with mean RR (and 95%CI) for nightly OSA at 99th vs. 25th percentile of temperature (brown indicates p-values < 0.05 and purple p-values > 0.05). Exact N and RR (95%CI) for each country is available in Table S1. Source data are provided as a Source Data file.