Association of several demographic and lifestyle factors with daily and severe GERD symptoms.

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 logistic regression models. In the analyses of frequency, Table S2. Results for mild and moderate symptoms are shown in Table S3. The ORs (95% CIs) are from multivariate models in which all the variables shown in this table were included.
* For age, the values are mean (standard deviation) years. Age was included in the models as a continuous variable, but the ORs (95% CIs) are shown here on a 10-year scale.