Figure 4. Adjusted ORs with 95% confidence intervals for the presence and new onset of nGER at follow-up by reported sleep duration at baseline and follow-up.

ORs are adjusted for age, BMI at baseline and delta-BMI, physical activity, caffeine intake, smoking habits, alcohol consumption, depression, anxiety, and snoring. The analysis of new-onset nGER excluded women with nGER at baseline. BMI = body mass index, nGER = nocturnal gastroesophageal reflux, OR = odds ratio.