Table 2.
Associations between frequency of doing housework and dementia for Chinese older adults.
| Frequency of doing housework | N cases/N total | ID (95%CI) per 1,000 persons-years | Model 1 HR (95% CI) | p value | Model 2 HR (95% CI) | p value | Model 3 HR (95% CI) | p value | Model 4 HR (95% CI) | p value |
|---|---|---|---|---|---|---|---|---|---|---|
| Rarely or never | 246/2322 | 13.7 (12.0–15.4) | Ref | Ref | Ref | Ref | ||||
| Sometimesa | 17/220 | 9.3 (5.4–14.8) | 0.70 (0.43–1.14) | 0.147 | 0.83 (0.50–1.35) | 0.446 | 0.83 (0.51–1.37) | 0.469 | 0.86 (0.52–1.41) | 0.549 |
| Regularlyb | 39/618 | 7.4 (5.3–10.2) | 0.56 (0.40–0.79) | 0.001 | 0.68 (0.48–0.95) | 0.026 | 0.68 (0.48–0.95) | 0.024 | 0.69 (0.49–0.98) | 0.036 |
| almost everyday | 183/4077 | 5.1 (4.4–5.9) | 0.39 (0.32–0.47) | <0.001 | 0.50 (0.41–0.62) | <0.001 | 0.48 (0.38–0.59) | <0.001 | 0.49 (0.39–0.61) | <0.001 |
a
Sometimes at least once for a month.
b
Regularly at least once for a week.
N, number; Ref, reference; ID, Incidence density; HR, hazard ratio; CI, Confidence interval.
Model 1 is unadjusted.
Model 2 adjusted for age and sex.
Model 3 adjusted for age, sex, marital status, education, living arrangement and economic level.
Model 4 adjusted for age, sex, marital status, education, living arrangement, economic level, BMI, sleeping duration, smoking status, drinking status, exercise, Stroke or cerebrovascular disease, garden work, playing card/mahjong, community activity.