Table 3.

HIV-1 subtype diversity in persons who inject drugs in Bulgaria.

Subtype	Number (%)	Sofia	Plovdiv	Other cities	Pa	Prisoner	Not prisoner	P	Roma (Gypsy)	Not Roma	P
CRF02_AG	50 (42.7)	1 (2.0)	48 (96.0)	1 (2.0)	<0.0001	16 (32.0)	34 (68.0)	<0.0001	19 (38.0)	31 (62.0)	ns
CRF01_AE	41 (35.0)	31 (75.6)	2 (4.9)	8 (19.5)	<0.0001	27 (65.9)	14 (34.1)	<0.01	17 (41.5)	24 (58.5)	ns
URFsb	12 (10.3)	4 (33.3)	8 (66.7)	0	nsc	11 (91.7)	1 (8.3)	<0.01	4 (33.3)	8 (66.7)	ns
B	10 (8.5)	4 (40.0)	1 (10.0)	5 (50.0)	0.01	1 (10.0)	9 (90.0)	<0.05	1 (10.0)	9 (90.0)	ns
F1	2 (1.7)	0	0	2 (100)	ns	1 (50.0)	1 (50.0)	ns	0	2 (100)	ns
CRF14_BG	2 (1.7)	2 (100)	0	0	ns	0	2 (100)	ns	0	2 (100)	ns
Total	117	42	59	16		56	61		41	76

^aP, probability determined using Fisher’s exact test.

^bURFs, unique recombinant forms.

^cns, not statistically significant.