Association between the human sex ratio at birth and prevalence of HIV/AIDS and tuberculosis (TB): global 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 | ≤0.1 (57) | Reference | Reference |
| 2nd | 0.2–0.3 (27) | −0.007 (−0.015 to +0.001), p=0.67 | −0.002 (−0.011 to +0.006), p=0.54 | |
| 3rd | 0.4–1.2 (39) | −0.010 (−0.017 to −0.003), p=0.006 | −0.006 (−0.014 to +0.002), p=0.17 | |
| 4th | ≥1.3 (38) | −0.029 (−0.036 to −0.022), p<0.001 | −0.022 (−0.031 to −0.013), p<0.001 | |
| TB prevalence (per 100 000) | 1st | ≤20 (47) | Reference | Reference |
| 2nd | 21–72 (44) | −0.003 (−0.011 to +0.005), p=0.50 | −0.003 (−0.012 to +0.006), p=0.51 | |
| 3rd | 73–285 (46) | +0.001 (−0.007 to +0.009), p=0.82 | −0.002 (−0.013 to +0.009), p=0.73 | |
| 4th | ≥286 (45) | −0.019 (−0.027 to −0.011), p<0.001 | −0.016 (−0.028 to −0.004), p=0.01 |
Twenty-three countries had values missing for HIV/AIDS and two countries had values missing for TB. Three values missing for Gross National Product (GNP) and 18 values were missing for malnutrition prevalence. First quartile was used as reference category.
↵* Model adjusted for GNP, latitude and prevalence of malnutrition in quartiles.
n, Number of countries per category.