PMID- 24206650 OWN - NLM STAT- MEDLINE DCOM- 20140131 LR - 20211021 IS - 1654-9880 (Electronic) IS - 1654-9716 (Print) IS - 1654-9880 (Linking) VI - 6 DP - 2013 Nov 8 TI - Monitoring health interventions--who's afraid of LQAS? PG - 21921 LID - 10.3402/gha.v6i0.21921 [doi] AB - Lot quality assurance sampling (LQAS) is used to evaluate health services. Subunits of a population (lots) are accepted or rejected according to the number of failures in a random sample (N) of a given lot. If failures are greater than decision value (d), we reject the lot and recommend corrective actions in the lot (i.e. intervention area); if they are equal to or less than d, we accept it. We used LQAS to monitor coverage during the last 3 days of a meningitis vaccination campaign in Niger. We selected one health area (lot) per day reporting the lowest administrative coverage in the previous 2 days. In the sampling plan we considered: N to be small enough to allow us to evaluate one lot per day, deciding to sample 16 individuals from the selected villages of each health area, using probability proportionate to population size; thresholds and d to vary according to administrative coverage reported; alpha