Table 2. Isotemporal substitution models for depressive symptoms.
| Isotemporal models | Sleep | SB | MVPA |
|---|---|---|---|
| PR (95%CI) | PR (95%CI) | PR (95%CI) | |
| 5 minutes/day | |||
| Replace sleep | Dropped | 1.01 (1.01-1.03)* | 0.99 (0.96-1.01) |
| Replace SB | 0.98 (0.97-0.99)* | Dropped | 0.97 (0.95-0.99)* |
| Replace MVPA | 1.01(0.99-1.04) | 1.03 (1.01-1.06)* | Dropped |
| 10 minutes/day | |||
| Replace sleep | Dropped | 1.03 (1.01-1.06)* | 0.97 (0.92-1.03) |
| Replace SB | 0.97 (0.95-0.99)* | Dropped | 0.94 (0.89-0.99)* |
| Replace MVPA | 1.02 (0.97-1.08) | 1.06 (1.01-1.11)* | Dropped |
| 15 minutes/day | |||
| Replace sleep | Dropped | 1.05 (1.01-1.08)* | 0.96 (0.89-1.04) |
| Replace SB | 0.95 (0.92-0.99)* | Dropped | 0.92 (0.85-0.99)* |
| Replace MVPA | 1.04 (0.96-1.13) | 1.08 (1.01-1.18)* | Dropped |
| 20 minutes/day | |||
| Replace sleep | Dropped | 1.06 (1.02-1.11)* | 0.95 (0.85-1.06) |
| Replace SB | 0.94 (0.90-0.98)* | Dropped | 0.89 (0.80-0.99)* |
| Replace MVPA | 1.05 (0.94-1.17) | 1.12 (0.01-1.24)* | Dropped |
| 25 minutes/day | |||
| Replace sleep | Dropped | 1.08 (1.02-1.14)* | 0.94 (0.82-1.08) |
| Replace SB | 0.92 (0.88-0.98)* | Dropped | 0.87 (0.76-0.99)* |
| Replace MVPA | 1.06 (0.93-1.22) | 1.15 (1.01-1.31)* | Dropped |
| 30 minutes/day | |||
| Replace sleep | Dropped | 1.10 (1.03-1.17)* | 0.93 (0.79-1.09) |
| Replace SB | 0.91 (0.85-0.97)* | Dropped | 0.85 (0.72-0.99)* |
| Replace MVPA | 1.08 (0.92-1.27) | 1.18 (1.01-1.38)* | Dropped |
| 35 minutes/day | |||
| Replace sleep | Dropped | 1.11 (1.03-1.20)* | 0.92 (0.76-1.11) |
| Replace SB | 0.89 (0.83-0.97)* | Dropped | 0.82 (0.68-0.98)* |
| Replace MVPA | 1.09 (0.90-1.32) | 1.22 (1.01-1.46)* | Dropped |
| 40 minutes/day | |||
| Replace sleep | Dropped | 1.13 (1.04-1.24)* | 0.90 (0.73-1.12) |
| Replace SB | 0.88 (0.81-0.97)* | Dropped | 0.80 (0.65-0.98)* |
| Replace MVPA | 1.10 (0.89-1.37) | 1.25 (1.01-1.54)* | Dropped |
| 45 minutes/day | |||
| Replace sleep | Dropped | 1.15 (1.04-1.27)* | 0.89 (0.70-1.14) |
| Replace SB | 0.87 (0.79-0.96)* | Dropped | 0.77 (0.61-0.98)* |
| Replace MVPA | 1.12 (0.87-1.43) | 1.28 (1.01-1.63)* | Dropped |
| 50 minutes/day | |||
| Replace sleep | Dropped | 1.17 (1.04-1.30)* | 0.88 (0.67-1.16) |
| Replace SB | 0.86 (0.77-0.96)* | Dropped | 0.75 (0.58-0.98)* |
| Replace MVPA | 1.13 (0.86-1.48) | 1.32 (1.02-1.72)* | Dropped |
| 55 minutes/day | |||
| Replace sleep | Dropped | 1.18 (1.05-1.34)* | 0.87 (0.65-1.17) |
| Replace SB | 0.84 (0.75-0.95)* | Dropped | 0.74 (0.55-0.98)* |
| Replace MVPA | 1.15 (0.85-1.55) | 1.36 (1.02-1.82)* | Dropped |
| 60 minutes/day | |||
| Replace sleep | Dropped | 1.20 (1.06-1.37)* | 0.86 (0.62-1.19) |
| Replace SB | 0.83 (0.73-0.95)* | Dropped | 0.71 (0.52-0.98)* |
| Replace MVPA | 1.16 (0.84-1.61) | 1.40 (1.02-1.92)* | Dropped |
CI = confidence interval; PR = prevalence ratio; MVPA = moderate-to-vigorous physical activity; SB = sedentary behavior. The PR was adjusted for sex, age, and marital status. * P < 0.05.