After adjusting for sex, age, BMI and albumin, independent risk factors for selenium deficiency were country, previous TB (adjusted odds ratio (aOR): 9.79, 95% CI: 1.69–56.83), anemia (aOR: 3.38, 95% CI: 1.27–8.99) and log10 CRP (aOR: 3.42, 95% CI: 1.60–7.29) in multivariable logistic regression models (Figure 2). The gene discussed is CRP; the disease is anemia.