Cutoff age (year) | <Cutoff | ≥Cutoff | ||||
---|---|---|---|---|---|---|
N | Mean (%) | N | Mean (%) | Difference | P value | |
6 | 13 | 5.85 | 64 | 6.27 | 0.42 | 0.704 |
7 | 28 | 6.41 | 49 | 6.08 | -0.33 | 0.687 |
8 | 37 | 6.39 | 40 | 6.02 | -0.36 | 0.62 |
9 | 42 | 6.42 | 35 | 5.93 | -0.49 | 0.49 |
10 | 50 | 6.77 | 27 | 5.14 | -1.64 | 0.018 |
11 | 54 | 6.68 | 23 | 5.06 | -1.63 | 0.028 |
12 | 57 | 6.64 | 20 | 4.94 | -1.70 | 0.033 |
13 | 64 | 6.52 | 13 | 4.60 | -1.92 | 0.074 |
14 | 66 | 6.39 | 11 | 5.05 | -1.34 | 0.239 |
16 | 71 | 6.34 | 6 | 4.50 | -1.84 | 0.011 |