Table 3.
Association between daytime napping and five components of successful aging among the total population and stratified by the nighttime sleep duration groups
| Low probability of disease | ||||
|
TOTAL OR (95%CI) |
Nighttime sleep duration (per night) | |||
|
< 6 h OR (95%CI) |
6 to less than 8 h OR (95%CI) |
≥8 h OR (95%CI) |
||
| Daytime napping (per day) | ||||
| 0 min | 1 | 1 | 1 | 1 |
| 1–60 min | 0.776 (0.686–0.878) | 0.818 (0.666–1.004) | 0.740 (0.599–0.916) | 0.753 (0.598–0.949) |
| > 60 min | 0.761 (0.651–0.889) | 0.770 (0.581–1.020) | 0.720 (0.548–0.947) | 0.759 (0.582–0.988) |
| No disease-related disability | ||||
|
TOTAL OR (95%CI) |
Nighttime sleep duration (per night) | |||
|
< 6 h OR (95%CI) |
6 to less than 8 h OR (95%CI) |
≥8 h OR (95%CI) |
||
| Daytime napping (per day) | ||||
| 0 min | 1 | 1 | 1 | 1 |
| 1–60 min | 0.848 (0.674–1.067) | 0.931 (0.675–1.285) | 0.746 (0.462–1.203) | 0.730 (0.448–1.188) |
| > 60 min | 0.595 (0.455–0.777) | 0.859 (0.558–1.324) | 0.355 (0.213–0.591) | 0.581 (0.345–0.980) |
| High cognitive functioning | ||||
|
TOTAL OR (95%CI) |
Nighttime sleep duration (per night) | |||
|
< 6 h OR (95%CI) |
6 to less than 8 h OR (95%CI) |
≥8 h OR (95%CI) |
||
| Daytime napping (per day) | ||||
| 0 min | 1 | 1 | 1 | 1 |
| 1–60 min | 1.233 (1.063–1.430) | 1.608 (1.257–2.056) | 1.187 (0.918–1.535) | 0.925 (0.699–1.223) |
| > 60 min | 1.062 (0.883–1.277) | 1.226 (0.880–1.707) | 0.875 (0.634–1.209) | 1.060 (0.774–1.452) |
| High physical functioning | ||||
|
TOTAL OR (95%CI) |
Nighttime sleep duration (per night) | |||
|
< 6 h OR (95%CI) |
6 to less than 8 h OR (95%CI) |
≥8 h OR (95%CI) |
||
| Daytime napping (per day) | ||||
| 0 min | 1 | 1 | 1 | 1 |
| 1–60 min | 0.927 (0.794–1.083) | 1.023 (0.808–1.295) | 0.783 (0.585–1.049) | 0.952 (0.704–1.287) |
| > 60 min | 0.775 (0.640–0.937) | 0.870 (0.632–1.196) | 0.573 (0.405–0.811) | 0.881 (0.627–1.238) |
| Active engagement with life | ||||
|
TOTAL OR (95%CI) |
Nighttime sleep duration (per night) | |||
|
< 6 h OR (95%CI) |
6 to less than 8 h OR (95%CI) |
≥8 h OR (95%CI) |
||
| Daytime napping (per day) | ||||
| 0 min | 1 | 1 | 1 | 1 |
| 1–60 min | 1.183 (1.044–1.339) | 1.246 (1.014–1.530) | 1.091 (0.880–1.353) | 1.200 (0.949–1.519) |
| > 60 min | 1.120 (0.958–1.310) | 1.223 (0.923–1.619) | 0.880 (0.667–1.159) | 1.300(0.993–1.700) |
aBold values indicate statistical significance
bBMI was not adjusted in the “low probability of disease” since obesity was regarded as a risk factor that was included in the dependent variable