. Author manuscript; available in PMC: 2021 Feb 5.

Published in final edited form as: AIDS Behav. 2020 Feb;24(2):648–654. doi: 10.1007/s10461-019-02708-0

Table 3.

Positive predictive value (PPV), negative predictive value (NPV), sensitivity, and specificity of measures of ART adherence readiness, in comparison with achievement of optimal early ART adherence

Pre-ART adherence readiness measure	Concordance statistics with achievement of optimal (≥ 85%) early ART adherence
Pre-ART adherence readiness measure	PPV	NPV	Sensitivity	Specificity
High (≥ 85%) adherence in 1st practice trial (n = 83)	0.413	0.850	0.897	0.315
Demonstrated readiness in pre-ART practice trial phase (n = 83)	0.394	0.917	0.966	0.204
Provider estimate of high ≥ 85%) ART adherence (n = 176)	0.506	0.798	0.710	0.623
HIV Medication Readiness Scale score ≥30 (n = 176)	0.370	0.660	0.435	0.596
Transtheoretical model of readiness to change score = 4 (n = 176)	0.442	0.778	0.742	0.491