Table 2.
Results of Fitting Bivariate Models to Investigate Relationships Between Baseline Characteristics and Risk of Discontinuing Work Data Adjusting for Study Cohort
| Cumulative Percentage Who Discontinued Work | Hazard Ratio | 95% CI | P-Value | |
|---|---|---|---|---|
| Study Cohort | ||||
| Cohort | ||||
| 1987 | 31.3 | Comparison Group | ||
| 1998 | 26.4 | 0.83 | 0.44–1.58 | 0.57 |
| Demographic Characteristics | ||||
| Age† | ||||
| Less than 50 | 26.1 | Comparison Group | ||
| 50 or More | 31.4 | 1.22 | 0.64–2.31 | 0.54 |
| Education, yrs | ||||
| 12 or More | 23.1 | 1.56 | 0.83–2.94 | 0.17 |
| Less than 12 | 34.4 | Comparison Group | ||
| Marital Status | ||||
| Not Married | 18.5 | Comparison Group | ||
| Married | 34.1 | 2.02 | 0.98–4.16 | 0.06 |
| Race | ||||
| Non-white | 41.7 | Comparison Group | ||
| White | 25.2 | 0.47 | 0.22–0.99 | 0.05 |
| Adjusted Income† | ||||
| Less than 40,000 | 23.1 | Comparison Group | ||
| 40,000 or More | 32.4 | 1.72 | 0.87–3.40 | 0.12 |
| Employment Characteristics | ||||
| Work Hours | ||||
| Less than 40 | 32.1 | Comparison Group | ||
| 40 or More | 25.3 | 0.68 | 0.36–1.28 | 0.29 |
| Like Work† | ||||
| Mod/Not at All | 32.4 | Comparison Group | ||
| Great Deal | 23.9 | 0.52 | 0.27–0.99 | 0.05 |
| Desire for Paid Work | ||||
| Want Part Time or Stay Home | 29.5 | Comparison Group | ||
| Want Full Time | 25.5 | 0.89 | 0.45–1.75 | 0.74 |
| Physical Demands of Job | ||||
| Mostly Physical or Both | 30.4 | Comparison Group | ||
| Mostly Mental | 21.6 | 0.67 | 0.31–1.48 | 0.32 |
| Occupation | ||||
| Blue Collar | 38.7 | Comparison Group | ||
| White collar | 25.0 | 0.53 | 0.27–1.04 | 0.07 |
| Supervise Others | ||||
| No | 28.8 | Comparison Group | ||
| Yes | 27.1 | 0.85 | 0.45–1.62 | 0.63 |
| Paid Sick Days† | ||||
| Less than Week | 35.5 | Comparison Group | ||
| Week or More | 19.0 | 0.54 | 0.29–1.00 | 0.05 |
| Family/Social Characteristics | ||||
| Satisfaction with Household Activity† | ||||
| Not Satisfied | 31.9 | Comparison Group | ||
| Satisfied/Very | 24.3 | 0.83 | .44–1.57 | 0.57 |
| Take Day Off | ||||
| Not Easy | 31.3 | Comparison Group | ||
| Very Easy | 25.3 | 0.82 | .44–1.53 | 0.53 |
| Number People in House† | ||||
| 3 or More | 35.3 | Comparison Group | ||
| 1–2 | 21.1 | 0.65 | .34–1.22 | 0.18 |
| Social Support† | ||||
| Less Than 64 | 23.2 | Comparison Group | ||
| 64 and Over | 32.9 | 1.40 | .74–2.64 | 0.30 |
| Health Status | ||||
| Total Number of Joint Deformities | ||||
| No Deformities | 20.0 | Comparison Group | ||
| 1 or More | 48.7 | 2.74 | 1.45–5.19 | 0.01 |
| Total Number Flares | ||||
| 0 or 1 | 23.5 | Comparison Group | ||
| 2 or More | 30.7 | 1.49 | .75–2.94 | 0.25 |
| Disease Stage | ||||
| Stage I | 23.7 | Comparison Group | ||
| Stage II or III | 37.0 | 1.67 | .86–3.27 | 0.13 |
| Rheumatoid Factor | ||||
| Negative | 35.8 | Comparison Group | ||
| Positive | 23.3 | 0.61 | .31–1.22 | 0.17 |
| Self-Reported Pain† | ||||
| Less Than 25 | 33.3 | Comparison Group | ||
| 25 and Over | 24.4 | 0.93 | .49–1.76 | 0.82 |
| Missed work† | ||||
| No Missed Work | 24.1 | Comparison Group | ||
| 1 or More Days | 44.4 | 1.90 | 0.92–3.92 | 0.08 |
†
Time Dependent Covariate