Table 3. Hazard Ratios and 95% CIs for All-Cause Mortality by Mean Steps per Day.
| Variable | No. of Cases | No. of Women | Hazard Ratio (95% CI)a | |||
|---|---|---|---|---|---|---|
| Model 1 | Model 2 | Model 3 | Model 4 (Adjusted for Stepping Intensity) | |||
| Mean steps/d | ||||||
| Quartile 1 (lowest) | 275 | 4185 | [Reference] | [Reference] | [Reference] | [Reference] |
| Quartile 2 | 103 | 4185 | 0.51 (0.40-0.64) | 0.59 (0.47-0.75) | 0.54 (0.43-0.69) | 0.68 (0.53-0.89) |
| Quartile 3 | 77 | 4186 | 0.44 (0.34-0.58) | 0.54 (0.41-0.72) | 0.47 (0.35-0.62) | 0.68 (0.49-0.94) |
| Quartile 4 (highest) | 49 | 4185 | 0.33 (0.23-0.45) | 0.42 (0.30-0.60) | 0.34 (0.24-0.48) | 0.58 (0.38-0.88) |
| P value for trend | <.01 | <.01 | <.01 | <.01 | ||
| Per 1000 steps/d | 0.80 (0.76-0.84) | 0.85 (0.81-0.90) | 0.82 (0.78-0.87) | 0.89 (0.83-0.95) | ||
a
Model 1 is adjusted for age and wear time. Model 2 is adjusted for Model 1 variables plus smoking status; alcohol use; intakes of saturated fat, fiber, fruits, and vegetables; hormone therapy; parental history of myocardial infarction; family history of cancer; general health; history of cardiovascular disease; history of cancer; and cancer screening. Model 3 is adjusted for Model 2 variables plus body mass index, calculated as weight in kilograms divided by height in meters squared; history of hypertension, high cholesterol, and diabetes. Model 4 is adjusted for Model 2 variables plus peak 1-minute cadence.