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Table 2 Prevalence of metabolic syndrome by sleep duration stratified by gender

From: Daily sleep duration and risk of metabolic syndrome among middle-aged and older Chinese adults: cross-sectional evidence from the Dongfeng–Tongji cohort study

  Male P Female P
Non-MetS MetS Non-MetS MetS
Daily sleep duration (hours)    0.12    <0.001
<7 236 (72.6) 89 (27.4)   370 (63.8) 210 (36.2)  
7-7.9 1048 (76.4) 324 (23.6)   1473 (66.3) 749 (33.7)  
8-8.9 2652 (76.4) 818 (23.6)   2928 (62.5) 1759 (37.5)  
9-9.9 2772 (77.0) 827 (23.0)   2380 (59.6) 1613 (40.4)  
≥10 1942 (74.6) 662 (25.4)   1337 (57.3) 995 (42.7)  
Nighttime sleep duration (hours)    0.19    0.005
<7 599 (73.0) 222 (27.0)   738 (64.3) 410 (35.7)  
7-7.9 2346 (76.3) 727 (23.7)   2470 (63.1) 1445 (36.9)  
8-8.9 3510 (76.4) 1083 (23.6)   3529 (60.4) 2316 (39.6)  
≥9 2195 (76.1) 688 (23.9)   1751 (60.3) 1155 (39.7)  
Daytime napping duration (minutes)    0.08    <0.001
None 2426 (77.6) 700 (22.4)   2996 (63.9) 1690 (27.9)  
<30 218 (74.9) 73 (25.1)   372 (72.1) 144 (27.9)  
30-59 1281 (76.8) 386 (23.2)   1515 (17.8) 922 (37.8)  
60-89 2625 (75.6) 849 (24.4)   2303 (27.1) 1577 (40.6)  
≥90 2100 (74.7) 712 (25.3)   1302 (15.3) 993 (43.3)  
  1. Abbreviations: MetS metabolic syndrome.