AIC	Akaike information criterion
ANC	antenatal clinic
CI	confidence interval
CTC	HIV care and treatment centre
HDSS	health and demographic surveillance system
HTC	HIV testing and counselling clinic
IQR	interquartile range
LSHTM	London School of Hygiene & Tropical Medicine
OR	odds ratio
PIRL	point-of-contact interactive record linkage
PMTCT	prevention of mother-to-child transmission
PPV	positive predictive value