Table 2 Prevalence of elevated hemoglobin A1c and the number needed to screen at the time of HIV testing according to national screening guidelines
Outcome | Noutcome/Ntotal | % | NNS | % hyperglycemic cases identified | % hyperglycemic cases missed |
|---|---|---|---|---|---|
Overall | |||||
 Diabetes (HbA1c ≥ 6.5%) | 26/1207 | 2.2 | 46.5 | 100 | 0 |
 Hyperglycemia (HbA1c ≥ 5.7%) | 239/1207 | 19.8 | 5.1 | 100 | 0 |
Age ≥ 45 years | |||||
 Diabetes (HbA1c ≥ 6.5%) | 10/143 | 7.0 | 14.3 | 38.5 | 61.5 |
 Hyperglycemia (HbA1c ≥ 5.7%) | 45/143 | 31.5 | 3.1 | 18.8 | 80.3 |
BMI ≥ 25 kg/m2 | |||||
 Diabetes (HbA1c ≥ 6.5%) | 19/685 | 2.8 | 36.0 | 73.1 | 26.9 |
 Hyperglycemia (HbA1c ≥ 5.7%) | 153/685 | 22.3 | 4.5 | 64.0 | 36.0 |
Age ≥ 45 years and/or BMI ≥ 25 kg/m2 | |||||
 Diabetes (HbA1c ≥ 6.5%) | 20/729 | 2.7 | 36.5 | 76.9 | 23.1 |
 Hyperglycemia (HbA1c ≥ 5.7%) | 163/729 | 22.4 | 4.5 | 68.2 | 31.8 |