Table 1 CD4 T cell counting in Yaoundé suburb and Ambang Bikok village obtained by the Auto40 flow cytometer installed in a therapeutic mobile unit, and by the FACSCalibur at the reference laboratory, expressed in 5^th-95^th percentile and mean.

	n*	5^th- 95^th percentile	Mean ± SD	P value**
Yaoundé suburb	188
. Absolute CD4 T cells***
- Auto40		111-2624	996 ± 874
- FACSCalibur		110-2620	989 ± 883	NS
. Percent CD4 T cells
- Auto40		6.0-48.0	27.1 ± 13.6
- FACSCalibur		6.0-49.0	36.7 ± 13.1	NS
Ambang Bikok	69
. Absolute CD4 T cells
- Auto40		530-1585	1041 ± 317
- FACSCalibur		585-1511	1032 ± 294	NS
. Percent CD4 T cell
- Auto40		26.8-52.0	38.5 ± 7.9
- FACSCalibur		26.2-51.8	37.5 ± 8.0	NS

* Number of blood samples with successful CD4 T cells counting by both Auto40 and FACSCalibur;
** P value for comparison of mean ± SD by Auto40 versus FACSCalibur taken as reference;
*** Absolute CD4 T cells are expressed in cells/μl.
SD: Standard deviation; NS: Not significant

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