Table 1

Proportions of participants recognising that sleep disturbances increase the risk of dementia stratified by demographic and sleep-related characteristics

Total No.Participants who recognise sleep disturbances as risk factors for dementia (No., %)Participants who did not recognise sleep disturbances as risk factors for dementia (No., %)P value
Overall33292416 (72.57)913 (27.43)
Sex< 0.001
 Men1150791 (68.78)359 (31.22)
 Women21791625 (74.58)554 (25.42)
Age (years)<0.001
 <4018401498 (81.41)342 (18.59)
 40–651383871 (62.98)512 (37.02)
 ≥6510647 (44.34)59 (55.66)
Education level (years)<0.001
 Primary school or illiteracy (≤ 6)5729 (50.88)28 (49.12)
 Middle or high school (6–12)614355 (57.82)259 (42.18)
 College or university (12–16)16671235 (74.09)432 (25.91)
 Postgraduate (≥16)991797 (80.42)194 (19.58)
Type of job<0.001
 Nonmanual25741970 (76.53)604 (23.47)
 Manual403272 (67.49)131 (32.51)
 Retired352174 (49.43)178 (50.57)
Income groups (yuan/month)0.021
 0–2000362259 (71.55)103 (28.45)
 2000–5000975674 (69.13)301 (30.87)
 5000–10 0001229919 (74.78)310 (25.22)
 >10 000763564 (73.92)199 (26.08)
Type of residence0.001
 City28872128 (73.71)759 (26.29)
 Town289189 (65.40)100 (34.60)
 Rural area15399 (64.71)54 (35.29)
Dementia contact0.005
 Yes1100835 (75.91)265 (24.09)
 No16691173 (70.28)496 (29.72)
 Unclear560408 (72.86)152 (27.14)
Shift work<0.001
 Yes753626 (83.13)127 (16.87)
 No25761790 (69.49)786 (30.51)
Sleep duration in the past 1 month (hours)0.037
 6–821551594 (73.97)561 (26.03)
 <6976688 (70.49)288 (29.51)
 >8198134 (67.68)64 (32.32)
Self-reported sleep quality in the past 1 month0.153
 Very good/pretty good20571475 (71.71)582 (28.29)
 Very bad/pretty bad1272941 (73.98)331 (26.02)
Self-reported diagnosis of sleep disturbances, neurological or psychiatric disorders0.160
 At least one845629 (74.44)216 (25.56)
 None24841787 (71.94)697 (28.06)