Table 2.
Cross-sectional associations of baseline napping duration with global cognitive function or biological age measures.
| Napping group | Global z scores | KDM-BAacc | PD | |||
|---|---|---|---|---|---|---|
| LSMa (95%CI) | p value | LSMa (95%CI) | p value | LSMa (95%CI) | p value | |
| Non-nappers (0 min) | -0.061 (−0.106, −0.015) | 0.005 | 0.255 (0.058,0.451) | 0.007 | 0.085 (0.016,0.154) | 0.011 |
| Short nappers (≤ 30 min) | 0.012 (−0.045,0.068) | 0.899 | −0.179 (−0.424,0.064) | 0.202 | 0.031 (−0.056,0.115) | 0.701 |
| Moderate nappers (30–90 min) | Reference | – | Reference | – | Reference | – |
| Extended nappers (≥ 90 min) | −0.078 (−0.143, −0.011) | 0.013 | 0.053 (−0.226,0.333) | 0.916 | 0.067 (−0.031,0.165) | 0.257 |
LSM, least-squares means; KDM-BAacc, Klemera and Doubal method-biological age acceleration; PD, physiological dysregulation; CI, confidence interval.
aAfter adjusting for age, sex, education level, residence, BMI, marital status, current smoking and drinking status, night sleep duration, depressive symptoms, and self-reported chronic diseases.