Table 1.
Crude mean (standard deviation) for physical and mental health component summary scores among the study population, by covariates (n = 12,132)
| n | Physical Health Component Summary | Mental Health Component Summary | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean (SD) | P value | Mean (SD) | P value | |||||||||||||||
| Gender | ||||||||||||||||||
| Male | 5,126 | 49.08 (6.69) | 0.731a | 51.17 (6.00) | <0.001a | |||||||||||||
| Female | 7,006 | 49.13 (6.68) | 50.58 (6.00) | |||||||||||||||
| Age at survey | ||||||||||||||||||
| 65-67 | 5,798 | 49.27 (6.52) | 0.012a | 50.75 (5.97) | 0.178a | |||||||||||||
| 68-70 | 6,334 | 48.96 (6.82) | 50.90 (6.04) | |||||||||||||||
| Family size | ||||||||||||||||||
| 1 | 1,775 | 48.41 (7.24) | * | * | * | <0.001b | 49.93 (6.65) | * | * | * | * | <0.001b | ||||||
| 2 | 6,291 | 49.29 (6.49) | * | 51.12 (5.86) | * | |||||||||||||
| 3 | 2,493 | 49.10 (6.69) | * | 50.76 (5.92) | * | |||||||||||||
| ≥4 | 1,478 | 49.14 (6.76) | * | 50.71 (5.92) | * | |||||||||||||
| Missing | 95 | 49.72 (6.46) | 51.70 (4.64) | * | ||||||||||||||
| Body mass index | ||||||||||||||||||
| Normal | 8,798 | 49.63 (6.31) | * | * | <0.001b | 50.91 (5.91) | * | <0.001b | ||||||||||
| Thin | 1,009 | 49.02 (6.89) | * | * | 49.75 (6.62) | * | * | |||||||||||
| Overweight | 2,225 | 47.09 (7.56) | * | * | * | 51.02 (6.04) | * | |||||||||||
| Missing | 100 | 48.98 (7.17) | * | 50.10 (6.22) | ||||||||||||||
| Number of chronic diseases under medical treatment | ||||||||||||||||||
| None | 4,852 | 50.17 (6.04) | * | * | * | <0.001b | 51.18 (5.55) | * | * | * | <0.001b | |||||||
| 1 | 2,716 | 49.27 (6.41) | * | * | * | 50.55 (6.34) | * | |||||||||||
| 2 | 2,515 | 48.47 (6.89) | * | * | * | 50.78 (5.97) | * | |||||||||||
| ≥3 | 2,049 | 47.16 (7.65) | * | * | * | 50.43 (6.57) | * | |||||||||||
| Smoking | ||||||||||||||||||
| Never-smoker | 6,809 | 49.31 (6.54) | * | * | 0.003b | 50.86 (5.87) | * | 0.002b | ||||||||||
| Ex-smoker | 3,551 | 48.90 (6.72) | * | 50.99 (5.95) | * | |||||||||||||
| Current smoker | 1,555 | 48.79 (7.13) | * | 50.30 (6.76) | * | * | ||||||||||||
| Missing | 217 | 48.62 (6.94) | 50.93 (5.18) | |||||||||||||||
| Frequency of alcohol consumption | ||||||||||||||||||
| None | 4,737 | 48.53 (7.15) | * | * | * | <0.001b | 50.41 (6.35) | * | * | * | <0.001b | |||||||
| Social | 2,679 | 49.26 (6.60) | * | 50.87 (5.73) | * | * | * | |||||||||||
| Occasional | 1,890 | 49.56 (6.23) | * | 51.10 (5.61) | * | * | ||||||||||||
| Daily | 2,768 | 49.64 (6.13) | * | 51.36 (5.85) | * | * | * | |||||||||||
| Missing | 58 | 49.05 (7.03) | 48.59 (6.69) | * | * | * | ||||||||||||
| Depression | ||||||||||||||||||
| Absent | 9,338 | 49.89 (5.98) | * | * | <0.001b | 51.97 (4.92) | * | * | <0.001b | |||||||||
| Present | 2,577 | 46.31 (8.17) | * | * | 46.69 (7.58) | * | * | |||||||||||
| Missing | 217 | 48.57 (6.56) | * | * | 50.65 (5.93) | * | * | |||||||||||
| Cognitive functioning | ||||||||||||||||||
| Intact | 10,587 | 49.57 (6.38) | * | <0.001b | 51.28 (5.61) | * | <0.001b | |||||||||||
| Poor | 1,524 | 45.94 (7.80) | * | 47.68 (7.50) | * | |||||||||||||
| Missing | 21 | 48.64 (7.10) | 49.37 (9.39) | |||||||||||||||
aDifferences between two groups were analyzed using the t test
bDifferences between three or more groups were analyzed using one-way analysis of variance (ANOVA)
* P<0.05 with multiple comparison test by the Tukey method