CI, confidence interval; GERD, gastroesophageal reflux disease; OR, odds ratio.Numbers may not add up to the total numbers due to missing data. The ORs (95% CIs) were calculated using multinomial logi
Controls are those with no heartburn or regurgitation. Numbers may not add up to the total numbers due to missing data. The odds ratios (95% confidence intervals) were adjusted for age, sex, ethnicity
OR, odds ratio; CI, confidence interval.aThe different numbers of GERD cases for the four sleep exposures are due to different numbers of missing observations in the sleep questions.bORs adjusted for