Table 4. Penile parameters according to age group.
| Age (y) | No. of patients | SPL (cm) | -2SD of SPL (cm) | Penile circumference (cm) | -2SD of penile circumference (cm) | p-value (SPL vs. circumference) |
|---|---|---|---|---|---|---|
| 0–1 | 180 | 3.6±0.4 | 2.8 | 3.8±0.4 | 3.0 | 0.001 |
| 1–2 | 137 | 3.9±0.5 | 2.9 | 3.9±0.4 | 3.1 | 0.803 |
| 2–3 | 83 | 4.0±0.5 | 3.0 | 3.9±0.3 | 3.3 | 0.196 |
| 3–4 | 74 | 4.3±0.6* | 3.1 | 4.1±0.5 | 3.1 | 0.034 |
| 4–5 | 71 | 4.2±0.6 | 3.0 | 4.1±0.4 | 3.3 | 0.271 |
| 5–6 | 43 | 4.5±0.7 | 3.1 | 4.2±0.4 | 3.4 | 0.068 |
| 6–7 | 45 | 4.4±0.5 | 3.4 | 4.3±0.4 | 3.5 | 0.367 |
| 7–8 | 20 | 4.6±0.5 | 3.6 | 4.3±0.5 | 3.3 | 0.091 |
| 8–9 | 22 | 4.7±0.6 | 3.5 | 4.5±0.4 | 3.7 | 0.573 |
| 9–10 | 15 | 4.6±0.9 | 2.8 | 4.6±0.7 | 3.2 | 0.713 |
| 10–11 | 16 | 5.2±1.1 | 3.0 | 5.0±0.8 | 3.4 | 0.669 |
| 11–12 | 14 | 5.9±1.4 | 3.1 | 5.7±1.3 | 3.1 | 0.769 |
| 12–13 | 16 | 6.9±2.0 | 2.9 | 6.4±1.8* | 2.8 | 0.539 |
| 13–14 | 14 | 8.2±2.0 | 4.2 | 7.5±1.6 | 3.3 | 0.352 |
Values are presented as mean±standard deviation.
SD, standard deviation; SPL, stretched penile length.
*p<0.05 (compared with previous age group).