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Table 2 Multivariable Logistic Regression on Daytime Napping and Successful Aging

From: Daytime napping and successful aging among older adults in China: a cross-sectional study

 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 (ref)
 1–60 min1.012 (0.829–1.234)1. 270 (0.887–1.817)1.004 (0.736–1.370)0.818 (0.559–1.196)
  > 60 min0.762 (0.583–0.996)0.875 (0.516–1.484)0.837 (0.550–1.276)0.617 (0.387–0.984)
Sex
 Male (ref)
 Female1.060 (0.804–1.396)0.727 (0.433–1.222)1.083 (0.706–1.662)1.541 (0.922–2.573)
Age
 60–64(ref)
 65–740.614 (0.507–0.745)0.639 (0.447–0.914)0.597 (0.443–0.804)0.620 (0.429–0.897)
  ≥ 750.451 (0.327–0.621)0.344 (0.189–0.625)0.468 (0.274–0.798)0.559 (0.320–0.978)
Education
 No formal education (illiterate) (ref)
 Did not finish primary school2.170 (1.606–2.933)1.906 (1.092–3.326)1.947 (1.192–3.180)2.635 (1.541–4.504)
 Sishu/homeschool/elementary school3.053 (2.280–4.087)2.937 (1.717–5.022)2.875 (1.801–4.589)3.439 (2.018–5.861)
 Middle school and above4.952 (3.685–6.656)5.261 (3.098–8.934)4.252 (2.640–6.849)5.887 (3.394–10.209)
Marital status
 Married and cohabited (ref)
 Other (Separated/divorced/widowed and never married)0.783 (0.612–1.003)0.995 (0.663–1.494)0.757 (0.501–1.144)0.590 (0.358–0.972)
Community type
 Rural area (ref)
 Urban area1.271 (1.030–1.568)1.591 (1.088–2.328)1.070 (0.774–1.480)1.391 (0.923–2.094)
Annual household income
  ≤ 2000 CNY (ref)
 2000 < x ≤ 10,000 CNY1.232 (0.953–1.593)1.042 (0.667–1.629)1.278 (0.839–1.947)1.447 (0.892–2.348)
 10,000 < x ≤ 25,000 CNY1.177 (0.901–1.537)0.932 (0.572–1.518)1.268 (0.832–1.932)1.340 (0.803–2.236)
  > 25,000 CNY1. 456 (1.135–1.868)1.039 (0.649–1.662)1.429 (0.960–2.127)2.010 (1.274–3.170)
Tobacco use
 No (ref)
 Yes1.078 (0.833–1.395)0.845 (0.515–1.384)1.220 (0.817–1.822)1.157 (0.721–1.856)
Alcohol consumption
 No (ref)
  < once a month1.350 (1.033–1.764)1.819 (1.123–2.948)1.033 (0.679–1.571)1.559 (0.933–2.606)
  ≥ once a month0.930 (0.710–1.217)0.911 (0.543–1.529)0.785 (0.516–1.194)1.224 (0.748–2.004)
Physical activity
 No (ref)
 Yes1.353 (1.130–1.620)1.185 (0.847–1.658)1.351 (1.019–1.790)1.545 (1.100–2.169)
Low quality of nighttime sleep
  < 1 day/week (ref)
 1–2 days/week1.078 (0.834–1.394)1.272 (0.758–2.134)0.843 (0.570–1.248)1.366 (0.854–2.187)
 3–4 days/week0.615 (0.452–0.837)0.735 (0.433–1.248)0.594 (0.374–0.943)0.522 (0.245–1.111)
 5–7 days/week0.659 (0.501–0.867)0.802 (0.531–1.212)0.468 (0.277–0.791)0.843 (0.429–1.656)
Nighttime sleep duration (per night)
 6 to less than 8 h (ref)
  < 6 h0.926 (0.734–1.169)
  ≥ 8 h0.936 (0.750–1.168)
  1. Bold values indicate statistical significance