Table 2. Demographic and epidemiologic characteristics of the study population relative to their HIV-1 genotypes.

		HIV-1 Genotype
Characteristics	Total (n = 91)	B′/C (n = 75)	B′ (n = 5)	C (n = 5)	Others* (n = 6)	P-value†
Gender, N (%)
Male	89 (100)	73 (82.0)	5 (5.6)	5 (5.6)	6 (6.7)	0.933
Female	2 (100)	2 (100.0)	0	0	0
Age (years)
Mean ± SD	35±7.3	35±7.3	43±6.1	33±7.0	30±4.6	0.034
Ethnic Group, N (%)
Achang	2(100)	2 (100)	0	0	0	0.661
Dai	44(100)	34 (77.3)	2 (4.5)	4 (9.1)	4 (9.1)
Han	19(100)	17 (89.5)	0	1 (5.3)	1 (5.3)
Jingpo	26(100)	22 (84.6)	3 (11.5)	0	1 (3.8)
District, N (%)
Longchuan	48 (100)	45 (93.8)	2 (4.2)	0	1 (2.1)	0.022
Luxi	10 (100)	7 (70.0)	0	2 (20.0)	1 (10.0)
Ruili	23 (100)	15 (65.2)	3 (13.0)	3 (13.0)	2 (8.7)
Yingjiang	10 (100)	8 (80.0)	0	0	2 (20.0)
Diagnosis Year
Before 1995	15 (100)	11 (73.3)	2 (15.4)	2 (13.3)	0	0.004
1996–1999	18 (100)	16 (88.9)	0	1 (5.6)	1 (5.6)
2000–2004	35 (100)	33 (94.3)	2 (5.7)	0	0
After 2005	9 (100)	4 (44.4)	0	2 (22.2)	3 (33.3)
Unknown	14 (100)	11 (78.6)	1 (7.1)	0	2 (14.3)
CD4+ T Cell Count (cells/µl)
Mean ± SD	435±253	425±248	493±275	576±262	399±321	0.568
HIV-1 Viral Load (log copies/ml)
Mean ± SD	4.49±0.68	4.47±0.70	4.79±0.56	4.87±0.72	4.33±0.52	0.524

SD: standard deviation.

^*The “other” category is used to group subjects with more rare genotypes including B′/C/CRF01_AE and C/CRF01_AE recombinants and pure CRF01_AE.

^†Statistical significance was determined by Fisher's exact test and one-way ANOVA analysis.