Table 5.
Percentage Change in Maximum IMT and RCRa by Work Time Measure During 11-Year Follow-Up, Kuopio Ischemic Heart Disease Risk Factor Study, 1986-2001 (N = 621)b
| Work Time Measure | Minimum, % (95% CI) | Median, % (95% CI) | Maximum, % (95% CI) | RCR (95% CI) | P Value |
|---|---|---|---|---|---|
| D/wk at baseline | 23.1 (16.1-30.4) | 31.3 (27.6-35.2) | 40.2 (33.9-46.7) | 1.14 (1.04-1.24) | .003 |
| H/d at baseline | 32.0 (25.5-38.8) | 32.7 (29.0-36.5) | 33.9 (25.4-43.0) | 1.01 (0.92-1.12) | .781 |
| H/wk at baseline | 29.5 (24.1-35.1) | 32.1 (28.3-36.0) | 38.9 (30.4-47.9) | 1.07 (0.98-1.17) | .118 |
| Employment intensity after baseline | 31.1 (25.0-37.4) | 33.0 (29.2-36.8) | 33.6 (29.3-38.2) | 1.02 (0.96-1.08) | .501 |
| Average hours worked per year employed after baseline | 28.8 (23.7-34.1) | 32.8 (29.1-36.6) | 41.1 (32.4-50.4) | 1.10 (1.01-1.20) | .038 |
Abbreviations: IMT, intima-media thickness; RCR, relative change ratio; CI, confidence interval.
a
RCR per unit change in IMT where unit is the observed range (maximum − minimum) in work time.
b
Results are from multiple regression analyses that adjusted for all 21 covariates listed in Table 1.