Table 1. Genetically Predicted Testosterone by Socio-demographic Characteristics Among 4,212 Men (50+), Guangzhou Biobank Cohort Study, 2003–2008.
| Characteristic | No. | % | Genetically predicted testosterone (nmol/L) | ||
|---|---|---|---|---|---|
| Mean | SD | ANOVA p value a | |||
| Age group, years | 4212 | 0.94 | |||
| 50–54 | 8.1 | 18.05 | 1.10 | ||
| 55–59 | 20.2 | 18.01 | 1.22 | ||
| 60–64 | 25.4 | 18.01 | 1.24 | ||
| 65–69 | 24.1 | 18.01 | 1.27 | ||
| 70–74 | 16.5 | 17.99 | 1.19 | ||
| 75–79 | 4.2 | 17.95 | 1.28 | ||
| ≥80 | 1.5 | 18.15 | 1.52 | ||
| Education | 4209 | 0.91 | |||
| Less than primary school | 2.6 | 18.11 | 1.36 | ||
| Primary school | 26.9 | 18.01 | 1.22 | ||
| Junior middle school | 30.0 | 18.01 | 1.19 | ||
| Senior middle school | 24.2 | 18.01 | 1.23 | ||
| Junior college | 8.9 | 17.99 | 1.34 | ||
| College | 7.4 | 17.96 | 1.24 | ||
| Smoking status | 4192 | 0.59 | |||
| Never smoker | 40.8 | 17.99 | 1.22 | ||
| Ex-smoker | 27.9 | 18.02 | 1.25 | ||
| Current smoker | 31.3 | 18.03 | 1.22 | ||
| Use of alcohol | 4212 | 0.49 | |||
| Never | 51.8 | 18.02 | 1.25 | ||
| <1/month | 19.9 | 18.03 | 1.19 | ||
| <1/week | 4.3 | 18.04 | 1.20 | ||
| 1-4/week | 6.0 | 18.03 | 1.30 | ||
| 5+/week | 11.9 | 17.90 | 1.19 | ||
| Ex-drinker | 4.4 | 18.01 | 1.20 | ||
| Unknown | 1.8 | 18.08 | 1.27 | ||
Abbreviation: SD, standard deviation
a Genetically predicted testosterone was not associated with age, socioeconomic position (education) or lifestyle, including smoking status and use of alcohol (ANOVA p value>0.05).