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Table 5 Subgroup analysis of age, sleep quality, atherosclerosis and TC of participants with different education levels

From: Preoperative assessment of cognitive function and risk assessment of cognitive impairment in elderly patients with orthopedics: a cross-sectional study

Variables

Illiterate

Primary school

Middle school or above

Statistical values

P

Age (yr), median (IQR)

70 (67, 76)

70 (68, 75)

71 (68, 76)

1.561a

0.458

Subjective sleep disorders, n (%)

28 (35.1)

46 (26.3)

29 (26.4)

0.900a

0.638

Atherosclerosis, n (%)

20 (22.5)

32 (18.3)

27 (24.5)

1.716a

0.424

TC (mmol/L, mean ± SD)

4.28 ± 1.01

4.4 ± 0.88

4.14 ± 1.08

2.382b

0.094

  1. SD Standard deviation, IQR Interquartile range, TC Total cholesterol
  2. aχ2 values; bF values