Skip to main content

Table 1 Interpretation of the single adherence measures and the composite adherence score (CAS)

From: Using a composite adherence tool to assess ART response and risk factors of poor adherence in pregnant and breastfeeding HIV-positive Cameroonian women at 6 and 12 months after initiating option B+

Single adherence tool* Medication refill Had 6 refills (3) Missed 1 refill (2) Missed 2 or more refills (1)
Self-report questionnaire No to all 4 questions (3) Yes to 1 question (2) Yes to 2 or more questions (1)
VAS 90% or more (3) 80% to less than 90% (2) Less than 80% (1)
Composite adherence tool Medication refill score 3 3 3 3 3 2 3 2 2 1
Self-report questionnaire score 3 3 3 2 2 2 1 2 1 1
VAS score 3 2 1 2 1 2 1 1 1 1
CAS 9 8 7 7 6 6 5 5 4 3
Overall adherence High Moderate Low
  1. CAS composite adherence score, VAS visual analogue scale; Single adherence scores: 3 = high adherence, 2 = moderate adherence, 1 = low adherence;