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Table 3 Interpretation of self-test results in the hands of lay users compared to health care worker

From: Comparison of practicability and effectiveness between unassisted HIV self-testing and directly assisted HIV self-testing in the Democratic Republic of the Congo: a randomized feasibility trial

  Directly assisted HIV self-testing   Unassisted HIV self-testing
Health care worker results Health care worker results
Positive (n = 12) Negative (n = 233) Invalid
(n = 18)
Positive (n = 6) Negative (n = 216) Invalid
(n = 15)
Participant results Positive (n = 12) 9
(75.0%)
3
(1.3%)
0
(0%)
Positive (n = 20) 5
(83.3%)
15
(6.9%)
0
(0%)
Negative (n = 232) 3
(25.0%)
224 (96.1%) 5
(27.8%)
Negative (n = 195) 0
(0%)
190
(88.0%)
5
(33.3%)
Invalid
(n = 19)
0
(0%)
6
(2.6%)
13
(72.2%)
Invalid
(n = 22)
1
(16.7%)
11
(5.1%)
10
(66.7%)
  Estimate (% [95% CI])   Estimate (% [95% CI])
Agreement 93.5% [90.5 to 96.5] 84.4% [80.0 to 88.8]
Cohen’s κ coefficient 0.69 [0.63 to 0.75] 0.44 (0.38 to 0.50)