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| GERD (control) | Constipation (study) | |
| No. of subjects | 142,086 | 147,595 |
| Age (mean [SD]) | 56.3 (17.6) | 54.2 (20.2) |
| Gender (n [%]) | ||
| Women | 92844 (65.3) | 102940 (69.7) |
| Men | 49242 (34.7) | 44655 (30.3) |
| Race/Ethnicity (n [%]) | ||
| Caucasian | 59147 (41.6) | 53483 (36.2) |
| Black | 14171 (10.0) | 15826 (10.7) |
| Hispanic | 28057 (19.7) | 36835 (25.0) |
| Asian | 20474 (14.4) | 21544 (14.6) |
| Other | 5408 (3.8) | 5790 (3.9) |
| Missing | 14829 (10.4) | 14117 (9.6) |
