Table I.
Analysis of the differences of penile erectile functional indexes between groups of different age using t-test.
| Penile erectile functional indexes | Age, months | T value | P-value |
|---|---|---|---|
| ICP/MAP ratio | 5 vs. 15 | 7.172 | P=0.002 |
| 15 vs. 24 | 4.545 | P=0.010a | |
| nNOS | 5 vs. 15 | t=11.366 | P<0.001a |
| 15 vs. 24 | t=0.889 | P=0.424 | |
| nNOS/Rho-kinase | 5 vs. 15 | t=11.302 | P<0.001a |
| ratio | 15 vs. 24 | t=7.576 | P=0.002a |
| Rho-kinase | 5 vs. 15 | t=9.875 | P=0.001a |
| 15 mo vs. 24 mo | t=35.585 | P<0.001a |
a
P<0.05, indicating a significant difference. nNOS, neuronal nitric oxide synthase; ICP/MAP, intracavernosal pressure/mean arterial pressure; Rho-kinase, Rho-associated kinase.