. Author manuscript; available in PMC: 2023 Jun 5.

Published in final edited form as: J Infect Dis. 2014 Nov 1;210(Suppl 1):S341–S346. doi: 10.1093/infdis/jiu162

Table 3.

Results of Expanded C-LQAS in 4 LGAs: 16 Clusters of 10 Children Each, Nigeria, 2013

LGA (Lot)	Total No. Unmarked	Classification	Proportion Marked (%)^a	95% CI^a	SD in Proportion Marked in a Cluster^b
Ikara	35	Poor	78	66–90	22.9
Kaduna North	29	Poor	82	75–88	12.2
Kankara	14	Intermediate	91	85–97	11.5
Katsina	53	Very Poor	67	60–74	13.5

Abbreviations: CI, confidence interval; LGA, local government area; C-LQAS, cluster lot quality assurance sampling; No., number; SD, standard deviation.

Point estimates and CIs account for the clustering. Possible sources of bias include incomplete sampling frame and nonresponse.

It is possible that observed variability could be an underestimate if the sampling frame used for the sampling of settlements was incomplete because of settlements that are unknown or unrecognized in the microplans.