Table 1.
Study population demographics.
| Variable | No. (%) | Difference (Year 1 vs. Years 2-5) | ||||
|---|---|---|---|---|---|---|
|
| ||||||
| Year 1 (n=557) | Year 2 (n=582) | Year 3 (n=599) | Year 4 (n=643) | Year 5 (n=676) | ||
| Age (yr)* | 80.4±8.9 | 81.8±8.9 | 81.5±8.6 | 80.1±8.6 | 79.3±8.6 | 0.21 (−0.53 to 0.96)† |
|
| ||||||
| Female gender | 421 (75.6) | 408 (70.1) | 425 (71.0) | 442 (68.7) | 459 (67.9) | <0.01‡ |
|
| ||||||
| Chinese ethnicity | 485 (87.1) | 519 (89.2) | 536 (89.5) | 557 (86.6) | 600 (88.8) | 0.13 |
* Data presented as mean±standard deviation. † Odds ratio (95% confidence interval). ‡P<0.05 was statistically significant