Table 2 Meta-analysis results of association between AGA and incidence of testicular germ cell tumor
Study characteristics | Number of studies | OR(95% CI) | P value | Effect model | Heterogeneity | |
|---|---|---|---|---|---|---|
I2 (%) | P value | |||||
Overall | 4 | 0.69 (0.58–0.83) | < 0.001 | fixed | 1.4 | 0.385 |
Seminoma | 4 | 0.71(0.55–0.93) | 0.011 | fixed | < 0.1 | 0.545 |
Nonseminoma | 4 | 0.57(0.44–0.74) | < 0.001 | fixed | 43.2 | 0.153 |
Baldness assessment type | ||||||
 self-reported | 3 | 0.61(0.47–0.78) | < 0.001 | fixed | < 0.1 | 0.697 |
Different amount of baldness | ||||||
 2nd vs. 1st stage | 2 | 0.46(0.30–0.72) | 0.001 | fixed | < 0.1 | 0.639 |
 3rd -4th vs. 1st stage | 2 | 0.67(0.40–1.13) | 0.135 | fixed | < 0.1 | 0.794 |
 5th -7th vs. 1st stage | 2 | 0.46(0.20–1.05) | 0.065 | fixed | < 0.1 | 0.797 |