Table 2. Sero-conversion and person years contributing to the analysis for each period (mean of imputation runs).

		All* (Six Sites)				Pre PMTCT (Four sites)				Post PMTCT (Five sites)
	Pregnancy and Maternity Status	SC	1000 PY	Rate /1000		SC	1000 PY	Rate /1000		SC	1000 PY	Rate /1000
Maternity Status
	Not pregnant	1861	121.10	15.37		271	28.33	9.57		1245	68.43	18.20
	Pregnant	304	24.75	12.28		62	6.65	10.32		169	12.52	13.46
	<1 year post partum	463	31.49	14.70		81	8.30	8.87		262	16.52	15.86
Pregnancy Status
	Not pregnant	2324	152.57	15.23		345	36.63	9.41		1507	84.95	17.74
	Pregnant	304	24.75	12.28		69	6.65	10.32		169	12.52	13.46

Note that the uMkhanyakude and Karonga site only contributes to the post PMTCT period.

^* Note that all is not the sum of pre and post- PMTCT due to the nature of censoring for the pre-PMTCT group.