| 1st wave | 2nd wave | p-value | ||
---|---|---|---|---|---|
Total | % within wave | Total | % within wave | ||
Sex | |||||
 Male | 217 | 70.2 | 125 | 61.6 | 0.04 |
 Female | 92 | 29.8 | 78 | 38.4 |  |
Age | |||||
 < 20 | 7 | 2.3 | 16 | 7.9 | 0.02 |
 21–30 | 21 | 6.8 | 12 | 5.9 |  |
 31–40 | 45 | 14.6 | 37 | 18.2 |  |
 41–50 | 71 | 23 | 29 | 14.3 |  |
 51–60 | 64 | 20.7 | 43 | 21.2 |  |
 61–70 | 58 | 18.8 | 33 | 16.3 |  |
 71–80 | 37 | 12 | 25 | 12.3 |  |
 > 80 | 6 | 1.9 | 8 | 3.9 |  |
Total | 309 | 100 | 203 | 100 | Â |