Table 3. Comparison of HIV-1 genotype distributions among IDUs in Dehong and Myanmar.

	Year of sampling	Region of sampling	Number of samples	Genome regions analyzed	Genotype				P-value†
					B′/C	B′	C	Other*
Present Study	2005–2009	Dehong	91	pol	75 (82.4)	5 (5.5)	5(5.5)	6 (6.6)	-
Pang etal. [20]	2009	Northern Myanmar	79	gag p17, pol, vif-env C2V3	37(46.8)	3(3.8)	6(7.6)	33(41.8)	<0.001
Takebe.etal. [27]	1999–2000	Central Myanmar	21	gag p17,envC2/V3	2(9.5)	7(33.3)	4(19.0)	8(38.1)	<0.001
Qiu. etal. [15]	1996–1998	Dehong	54	env C2V3,near-full-length sequences	4(7.4)	49 (90.7)	1(1.9)	0	<0.001
Yang. etal. [11]	2000–2001	Dehong	14	gag-RTenv C2V3	9(64.3)	4 (28.6)	0	1 (7.1)	0.032
Zhang. et al. [16]	2003	Dehong	13	gag p17 and RT	8(61.5)	2 (15.4)	0	3 (23.1)	0.087

^*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 of the distribution of genotypes between previous study and present study was determined by Fisher's exact test.