Association between the human sex ratio at birth and prevalence of HIV/AIDS and tuberculosis (TB): African analysis
| Quartile | Prevalence range (n) | Unadjusted model sex ratio at birth (95% CI) | Adjusted model* sex ratio at birth (95% CI) | |
| HIV/AIDS prevalence (%) | 1st | ≤0.9 (13) | Reference | Reference |
| 2nd | 1.0–2.5 (13) | −0.003 (−0.011 to +0.005), p=0.41 | 0.000 (−0.008 to +0.009), p=0.96 | |
| 3rd | 2.6–5.3 (11) | −0.006 (−0.014 to +0.003), p=0.17 | +0.001 (−0.009 to +0.011), p=0.84 | |
| 4th | ≥5.4 (12) | −0.013 (−0.022 to −0.005), p=0.002 | −0.009 (−0.018 to −0.000), p=0.04 | |
| TB prevalence (per 100 000) | 1st | ≤191 (14) | Reference | Reference |
| 2nd | 192–397 (13) | −0.012 (−0.019 to −0.004), p=0.003 | −0.005 (−0.013 to +0.003), p=0.25 | |
| 3rd | 398–562 (13) | −0.009 (−0.016 to −0.001), p=0.025 | −0.001 (−0.009 to +0.008), p=0.84 | |
| 4th | ≥563 (13) | −0.012 (−0.020 to −0.005), p=0.002 | −0.009 (−0.017 to −0.002), p=0.013 |
Four values missing for HIV/AIDS, one for Gross National Product (GNP) and two for malnutrition prevalence. First quartile was used as reference category.
↵* Model adjusted for GNP, latitude and malnutrition prevalence in quartiles.
n, Number of countries per category.