Table 1.
Sample characteristics at start of study (1990–1991) of the eligible and ineligible women in the mixed effects modeling analyses of abdominal pain severity
| Eligible Women (n = 291) | Ineligible Women (n = 217) | ||
|---|---|---|---|
| Characteristic | Mean (SD) | Mean (SD) | P-value a |
| Age (years) | 41.5 (4.3) | 42.0 (5.0) | 0.180 |
| Years of education | 15.9 (2.8) | 15.3 (3.0) | 0.030 |
| Family income ($) |
38,200 (15,000) 18.6 (7.0) |
35,200 (17,600) 17.1 (8.3) |
0.040 |
| Characteristic | N (Percent) | N (Percent) | P-value b |
| Currently employed | 0.400 | ||
| Yes | 254 (87.3) | 184 (84.8) | |
| No | 37 (12.7) | 33 (15.2) | |
| Race/ethnicity | 0.001 | ||
| African American | 20 (6.9) | 38 (17.5) | |
| Asian /Pacific Islander | 27 (9.3) | 16 (7.4) | |
| White | 238 (81.8) | 153 (70.5) | |
| Other (Hispanic, Mixed) | 6 (2.1) | 10 (4.6) | |
| Marital Status | 0.420 | ||
| Married/partnered | 278 (71.1) | 141 (65.0) | |
| Divorced/widowed/not partnered | 63 (21.7) | 62 (28.6) | |
| Never married/partnered | 21 (7.2) | 14 (6.5) |
a Independent t-test
b Chi-square test