| Table 1: Description of demographic and selected health characteristics of subjects | |||
| Study sample | |||
| Characteristic | Item-generation group n = 57 | Item-selection group n = 50 | Evaluation group n = 67 |
| Mean age, yr | 43.9 | 47.0 | 41.0 |
| Sex, % female | 86 | 76 | 85 |
| Education, % with high school or less education | 35 | 50 | 49 |
| Diagnosis of gallstones made in last 6 months, % | 54 | 64 | 64 |
| % with one or more comorbid condition | 50 | 50 | 47 |
| % with gastrointestinal condition in addition to gallstones | 7 | 12 | 24 |