Table 4.

Hazard ratios of death per 2 min/hr tradeoff of lower-level activity duration with higher-level activity duration

Variable↑ 2 min/hr of Low-Intensity Activity Duration: HR (95% CI, P Value)↑ 2 min/hr of Light-Intensity Activity Duration: HR (95% CI, P Value)↑ 2 min/hr of Moderate- or Vigorous-Intensity Activity Duration: HR (95% CI, P Value)
Entire cohorta
 ↓2 min/hr of sedentary duration1.01 (0.86 to 1.19; P=0.87)0.67 (0.48 to 0.93; P=0.02)0.80 (0.42 to 1.51; P=0.46)
 ↓2 min/hr of low-intensity activity duration0.66 (0.42 to 1.05; P=0.08)0.79 (0.44 to 1.40; P=0.39)
 ↓2 min/hr of light-intensity activity duration1.19 (0.52 to 2.73; P=0.66)
CKD subgroupa
 ↓2 min/hr of sedentary duration1.09 (0.82 to 1.44; P=0.54)0.59 (0.35 to 0.98; P=0.04)0.46 (0.09 to 2.45; P=0.34)
 ↓2 min/hr of low-intensity activity duration0.54 (0.26 to 1.13; P=0.10)0.42 (0.08 to 2.15; P=0.28)
 ↓2 min/hr of light-intensity activity duration0.79 (0.12 to 5.50; P=0.80)
  • Hazard ratios from Cox regression models that took survey design into account. For tradeoff: mortality risk associated with each 2 min/hr shorter lower-intensity activity duration with a corresponding 2 min/hr greater higher-intensity activity duration while controlling for the other two activity durations. Adjusted for age, sex, race, education, smoke, alcohol use, lung disease, mobility limitations. HR, hazard ratio; 95% CI, 95% confidence interval.

  • a No missing variables for these main models.