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. Author manuscript; available in PMC: 2014 Aug 1.
Published in final edited form as: HIV Med. 2014 Jan 26;15(7):406–416. doi: 10.1111/hiv.12124

Table A9.

Rate of first virological failure per 1000 person-years by income

Income Virological failure (n) Person-years (1000’s) Crude rate (95% CI) (per 1000 person years)
Low/middle 187 3.586 52.145 (45.182, 60.18)
High 509 7.002 72.69 (66.642, 79.288)

Virological failure = 400 copies/mL; low-level viraemia (LLV) = 200–400 copies/mL.

The analysis included all patients who had achieved undetectable viral load (≤ 50 copies/mL) within 1 year of starting combination antiretroviral therapy (cART) and prior to subsequent viral failure, and excluded periods off treatment or on mono/duo for > 7 days.