Table 2: Two-by-two table showing proportions of participants assigned to the 4 mutually exclusive self-harm categories
Self-reported self-harmMedically verified self-harm; no. (%) of participants
n = 1315
NoYesTotal
No1023 (77.8)
(unconfirmed negative)		106 (8.1)
(false negative)		1129 (85.8)
Yes122 (9.3)
(unconfirmed positive)		64 (4.9)
(true positive)		186 (14.1)
Total1145 (87.1)170 (12.9)1315 (100.0)