TABLE 1.
—Comparison of Baseline Characteristics, by Level of Cost Sharing: Medical Outcomes Study
| Cost-Sharing Level | ||||
| None (n = 824) | Low (n = 611) | High (n = 265) | P | |
| Mean age, y (95% CI) | 58.7 (57.6, 59.8) | 54.8 (53.6, 56.1) | 57.4 (55.4, 59.5) | .001 |
| Females, % | 60 | 63 | 60 | . . . |
| Minority, % | 25 | 12 | 24 | .001 |
| Married or has a partner, % | 63 | 66 | 54 | .001 |
| Graduated high school, % | 78 | 86 | 75 | .001 |
| Employed, % | 38 | 48 | 39 | .001 |
| Mean annual family incomea (95% CI) | 20.3 (19.3, 21.3) | 23.5 (22.3 , 24.7) | 20.0 (17.9, 22.2) | .001 |
| Insurance status, % | .001 | |||
| Uninsured | 0.5 | 5 | 2 | . . . |
| Medicaid | 16 | 6 | 9 | . . . |
| Prepaid health plan | 68 | 21 | 16 | . . . |
| –Fee for service | 16 | 68 | 74 | . . . |
| Mean comorbidity score (95% CI) | 2.0 (1.9, 2.1) | 1.9 (1.8, 2.0) | 1.9 (1.8, 2.1) | >.2 |
| Mean physical health status score (95% CI) | 42.6 (41.8, 43.4) | 43.6 (42.7, 44.6) | 43.1 (41.6, 44.6) | >.2 |
| Mean mental health status score (95% CI) | 50.4 (49.6, 51.1) | 49.0 (48.1, 49.9) | 48.9 (47.6, 50.3) | .05 |
| Mean general satisfaction score (95% CI) | 6.5 (6.4, 6.7) | 6.5 (6.4, 6.7) | 6.5 (6.3, 6.7) | >.2 |
Note. CI = confidence interval.
a$1000s in 1986 dollars.