Table 1. T-cell subsets and proviral load in AC, HAM and ATL.

Patient group	Parameter	CD3		CD4		CD8		PVL (copies per 100 PBMCS)
		Absolute count (10^6/uL)	Relative count (% lymphocytes)	Absolute count (10^6/uL)	Relative count (% lymphocytes)	Absolute count (10^6/uL)	Relative count (% lymphocytes)
AC (n = 17)	Minimum	881	61.4	539	30	194	12	<0.1
	25% Percentile	1139	67	860	45	289	15	0.7
	Median	1454	73	989	53	385	19	2.8
	75% Percentile	1852	79	1260	58	518	27	18.9
	Maximum	2970	87	1563	66	1470	42	27.9
	Mean	1458	73	1049	51	461	22	9.4
	Std. Deviation	631	8	301	9	360	10	10.4
	Std. Error	158	2	78	2	90	2	2.5
HAM (n = 28)	Minimum	723	59	264	22	232	17	0.4
	25% Percentile	1112	74	678	44	342	22	4.4
	Median	1347	79	864	50	508	25	6.9
	75% Percentile	2057	84	1301	55	855	36	12.6
	Maximum	3768	95	2368	60	1495	73	28.8
	Mean	1644	78	1012	48	633	30	9.0
	Std. Deviation	789	9	522	10	371	13	7.2
	Std. Error	147	2	97	2	69	2	1.3
ATL (n = 28)	Minimum	574	38	334	22	160	1	2.0
	25% Percentile	2345	81	1454	58	287	3	20.3
	Median	6494	93	5499	83	366	8	29.8
	75% Percentile	11868	95	10600	91	531	16	64.6
	Maximum	91000	99	11612	94	1252	31	276.2
	Mean	14534	85	5695	73	446	10	54.3
	Std. Deviation	24674	16	4343	22	263	9	59.9
	Std. Error	5384	4	1024	5	62	2	11.8
Significance of difference?	AC vs HAM	Ns	Ns	ns	ns	ns	ns	ns
	AC vs ATL	***	***	*	***	ns	*	***
	HAM vs ATL	***	***	***	***	ns	***	***

* denotes p<0.05,

*** denotes p<0.001, ns denotes not significant

AC denotes asymptomatic carriers, HAM denotes HTLV-1-associated myelopathy, ATL denotes adult T-cell leukaemia/lymphoma