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Table 3 Predictive values and likelihood ratios of self-reported undetectable VL in CHIWOS sub-populations (n = 336)

From: Validating a self-report measure of HIV viral suppression: an analysis of linked questionnaire and clinical data from the Canadian HIV Women’s Sexual and Reproductive Health Cohort Study

  PPV (95% CI) NPV (95% CI) LR+ (95% CI) LR− (95% CI)
Ethnicity
 Indigenous 92.6 (86.4–96.5) 86.7 (69.3–96.2) 3.8 (2.1–6.6) 0.05 (0.02–0.12)
 Caucasian 94.8 (89.1–98.1) 70.6 (44.0–89.7) 2.9 (1.5–5.5) 0.07 (0.03–0.16)
 African/Caribbean/Black 91.3 (72.0–98.9) 100.0 (29.2–100.0) 2.5 (0.8–7.3) NA
 Other 96.0 (79.6–99.9) 0 (0–97.5) 1.0 (0.9–1.0) NA
Education
 <High school 91.4 (82.3–96.8) 73.7 (48.8–90.9) 3.1 (1.6–6.1) 0.10 (0.04–0.25)
 ≥High school 91.4 (82.3–96.8) 84.4 (67.2–94.7) 3.4 (2.1–5.6) 0.03 (0.01–0.08)
Illicit drug use in past 3 months
 Yes 90.4 (81.9–95.8) 80.0 (61.4–92.3) 3.7 (2.0–6.8) 0.10 (0.04–0.22)
 No 95.0 (91.0–97.6) 80.1 (58.1–94.6) 2.6 (1.6–4.3) 0.03 (0.01–0.09)
  1. PPV positive predictive value, NPV negative predictive value, LR+ positive likelihood ratio, LR− negative likelihood ratio, 95% CI 95 percent confidence interval, VL viral load, CHIWOS Canadian HIV Women’s Sexual and Reproductive Health Cohort Study