Table 1. Patient Demographics.
| Variable | Total | Year of sampling (%) | p-value | ||||
|---|---|---|---|---|---|---|---|
| 2004 | 2007 | 2010 | 2013 | ||||
| Sex | 0.626 | ||||||
| Male | 150 (37.5) | 35 | 36 | 36 | 43 | ||
| Female | 250 (62.5) | 65 | 64 | 64 | 57 | ||
| Age (yr) | |||||||
| Range | 60–104 | 60.6–96.2 | 60.8–98.8 | 60–94.6 | 61.2–104 | ||
| Mean ± SD | 80.5 ± 8.8 | 80.8 ± 9.3 | 80.1 ± 8.3 | 79.4 ± 8.4 | 81.7 ± 9.1 | 0.266 | |
| Median (IQR) | 81.1 (74.6–87.1) | 82.0 (74.6–87.1) | 80.2 (75.9–86.8) | 80.0 (74.4–85.7) | 83.2 (74.5–87.7) | 0.279 | |
| Ethnicity | 0.360 | ||||||
| Chinese | 339 (84.8) | 88 | 81 | 82 | 88 | ||
| Malay | 25 (6.2) | 5 | 10 | 7 | 3 | ||
| Indian | 29 (7.2) | 7 | 8 | 7 | 7 | ||
| Others | 7 (1.8) | 0 | 1 | 4 | 2 | ||
Values are presented as number (%) unless otherwise indicated.
SD: standard deviation, IQR: interquartile range.