Table 3.

Relationships among durations of each intensity of physical activity

Variable∆ Sedentary Duration∆ Low-Intensity Activity Duration∆ Light-Intensity Activity Dureation∆ Moderate- or Vigorous-Intensity Activity Duration
Entire cohort
 ↑ 2 min/hr of sedentary duration−0.72 (−0.77 to −0.68)−1.11 (−1.15 to −1.07)−0.17 (−0.19 to −0.15)
 ↑ 2 min/hr of low-intensity activity duration−2.77 (−2.89 to −2.64)0.86 (0.76 to 0.96)−0.09 (−0.13 to −0.06)
 ↑ 2 min/hr of light-intensity activity duration−2.83 (−2.94 to −2.72)0.57 (0.48 to 0.67)0.25 (0.22 to 0.29)
 ↑ 2 min/hr of moderate or vigorous-intensity activity duration−6.88 (−7.41 to −6.35)−0.64 (−0.96 to −0.33)4.26 (3.80 to 4.72)
CKD subgroup
 ↑ 2 min/hr of sedentary duration−1.02 (−1.15 to −0.90)−0.92 (−1.02 to −0.82)−0.06 (−0.09 to −0.03)
 ↑ 2 min/hr of low-intensity activity duration−2.77 (−2.92 to −2.61)0.78 (0.63 to 0.93)−0.02 (−0.04 to 0.01)
 ↑ 2 min/hr of light-intensity activity duration−3.07 (−3.36 to −2.79)0.96 (0.69 to 1.24)0.11 (0.04 to 0.18)
 ↑ 2 min/hr of moderate or vigorous-intensity activity duration−6.02 (−8.43 to −3.62)0.13 (−0.72 to 0.98)3.67 (1.80 to 5.55)
  • Values are expressed as coefficients (95% confidence intervals). The entries in each row of the table provide survey weight–adjusted estimated mean differences in the durations of each of the remaining three activity levels associated with 2 min/hr more of the activity indicated in the left column. The 2 min/hr more in moderate- or vigorous-intensity physical activity (MPVA) in the bottom row is based on a change from 0.07 min/hr to 2.07 min/hr, which corresponds roughly to an increase from the 25% and 95% percentiles of moderate- or vigorous-intensity in CKD subgroup and 5% and 75% percentiles of moderate- or vigorous-intensity in the entire cohort. Results are based on multiple linear regressions adjusted for age, sex, race, education, smoke, alcohol use, lung disease, and mobility limitations.