Table 5. Frequency of reported Tanner stage of male genital development across the nine time points.
| Q | Age (y) | Stage 1 | Stage 2 | Stage 3 | Stage 4 | Stage 5 | N (= 100%) |
|---|---|---|---|---|---|---|---|
| 1 | 8 | 29.2% | 39.2% | 25.9% | 5.3% | 0.4% | 2791 |
| 2 | 9 | 61.4% | 31.2% | 5.3% | 0.7% | 0.1% | 3606 |
| 3 | 10 | 21.0% | 37.4% | 31.6% | 9.6% | 0.4% | 2892 |
| 4 | 11 | 10.5% | 30.2% | 39.0% | 18.6% | 1.7% | 2611 |
| 5 | 12 | 3.5% | 14.9% | 34.7% | 37.7% | 9.2% | 2138 |
| 6 | 14 | 1.0% | 4.7% | 17.3% | 50.7% | 26.4% | 2873 |
| 7 | 15 | 0.5% | 2.0% | 10.6% | 51.2% | 35.8% | 2566 |
| 8 | 16 | 0.4% | 1.1% | 7.0% | 36.6% | 54.9% | 1673 |
| 9 | 17 | 0.3% | 0.7% | 3.7% | 25.4% | 69.9% | 1525 |
Q = questionnaire no.; Y = year; N = no. of individuals with data