Table 4 Stepwise analysis of the effect of paternal age on cases, controls
From: Advanced paternal age is a risk factor for schizophrenia in Iranians
| Â | Â | B | Standard error | Significance | Exp(B) | 95% CI for Exp(B) | |
|---|---|---|---|---|---|---|---|
| Â | Â | Â | Â | Â | Â | Lower | Upper |
Step 1 | Birth rank | 0.313 | 0.131 | 0.017 | 1.368 | 1.058 | 1.769 |
| Â | Constant | -0.642 | 0.285 | 0.025 | 0.526 | Â | Â |
Step 2 | Birth rank | 0.237 | 0.142 | 0.096 | 1.268 | 0.959 | 1.676 |
| Â | Family history | 0.481 | 0.263 | 0.067 | 1.618 | 0.967 | 2.707 |
| Â | Maternal age | 0.387 | 0.377 | 0.304 | 1.473 | 0.704 | 3.083 |
| Â | Constant | -0.599 | 0.297 | 0.044 | 0.550 | Â | Â |
Step 3 | Birth rank | -0.115 | 0.169 | 0.496 | 0.891 | 0.640 | 1.241 |
| Â | Family history | 0.444 | 0.268 | 0.098 | 1.559 | 0.922 | 2.638 |
| Â | Maternal age | -0.374 | 0.431 | 0.386 | 0.688 | 0.296 | 1.602 |
| Â | Paternal age | 1.329 | 0.336 | 0.000 | 3.778 | 1.955 | 7.304 |
| Â | Constant | -0.123 | 0.321 | 0.703 | 0.885 | Â | Â |