Table 1 Demographic characteristics of the participants stratified by handgrip strength status and type of sensory impairment at baseline.

From: Combined effects of handgrip strength and sensory impairment on the prevalence of cognitive impairment among older adults in Korea

Variable

Total (n = 2930)

Normal handgrip strength (n = 1656)

p

Low handgrip strength (n = 1274)

p

NI (n = 1263)

VI (n = 290)

HI (n = 73)

DI (n = 30)

NI (n = 766)

VI (n = 316)

HI (n = 79)

DI (n = 113)

Age, mean (SD)

73.5 ± 6.1

71.4 ± 5.2

72.2 ± 5.2

73.9 ± 5.5

76.0 ± 5.3

***

74.5 ± 6.0

76.3 ± 6.1

78.7 ± 6.0

80.2 ± 6.3

***

Female, n (%)

1599 (54.6%)

650 (51.5%)

163 (56.2%)

27 (37.0%)

13 (43.3%)

*

411 (53.7%)

229 (72.5%)

45 (57.0%)

61 (54.0%)

***

Primary school or less, n (%)

1671 (57.0%)

595 (47.1%)

173 (59.7%)

34 (46.6%)

17 (56.7%)

**

454 (59.3%)

249 (78.8%)

59 (74.7%)

90 (79.6%)

***

Married, n (%)

2116 (72.2%)

990 (78.4%)

210 (72.4%)

61 (83.6%)

20 (66.7%)

*

544 (71.0%)

173 (54.7%)

56 (70.9%)

62 (54.9%)

***

K-MMSE, mean (SD)

24.9 ± 5.0

26.6 ± 3.6

24.6 ± 4.8

24.8 ± 4.1

23.3 ± 5.8

***

24.6 ± 4.8

22.3 ± 5.4

20.6 ± 6.7

18.3 ± 6.2

***

  1. Analyzed using available data, including missing data. P value for the Pearson chi-square test for group comparisons of types of sensory impairment within each group of handgrip strength.
  2. DI dual sensory impairment, HI hearing impairment only, K-MMSE Korean version of Mini-Mental State Examination, NI no sensory impairment, SD standard deviation, VI vision impairment only.
  3. *p < 0.05, **p < 0.01, ***p < 0.001.