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Table 1 Demographic and clinical characteristics of the study population according to whether or not they belong to a molecular transmission cluster

From: HIV-1 molecular transmission clusters in nine European countries and Canada: association with demographic and clinical factors

  Non-clustered
n=5,255
Clustered
n=3,700
Overall
N=8,955
 
N (%) N (%) N (%) P-value
Sex     < 0.001
 Male 3805 (72) 3154 (85) 6959 (78)  
 Female 1120 (21) 331 (9) 1451 (16)  
 Unknown 330 (6) 215 (6) 545 (6)  
Risk group     < 0.001
 MSM 2423 (46) 2557 (69) 4980 (56)  
 PWID 692 (13) 246 (7) 938 (11)  
 MSW 1510 (29) 577 (16) 2087 (23)  
 Haemophiliacs 10 (<1) 2 (<1) 12 (<1)  
 Other – unknown 620 (12) 318 (9) 938 (11)  
Ethnicity     < 0.001
 White 2434 (46) 1419 (38) 3853 (43)  
 Black 377 (7) 72 (2) 449 (5)  
 Other 377 (7) 160 (4) 537 (6)  
 Unknown 2067 (39) 2049 (55) 4116 (46)  
Country     < 0.001
 Canada 558 (11) 383 (10) 941 (11)  
 France 18 (<1) 5 (<1) 23 (<1)  
 Germany 641 (12) 901 (24) 1542 (17)  
 Greece 28 (<1) 7 (<1) 35 (<1)  
 Italy 909 (17) 188 (5) 1097 (12)  
 Netherlands 51 (1) 7 (<1) 58 (<1)  
 Norway 399 (8) 226 (6) 625 (7)  
 UK 975 (19) 584 (16) 1559 (17)  
 Austria 687 (13) 410 (11) 1097 (12)  
 Spain 989 (19) 989 (27) 1978 (22)  
Subtype     < 0.001
 B 4195 (80) 3350 (91) 7545 (84)  
 C 352 (7) 81 (2) 433 (5)  
 A 192 (4) 68 (2) 260 (3)  
 CRF01_AE 156 (3) 36 (1) 192 (2)  
 CRF02_AG 224 (4) 89 (2) 313 (4)  
 D 42 (<1) 11 (0) 53 (<1)  
 G 45 (<1) 24 (0) 69 (<1)  
 F 49 (<1) 41 (1) 90 (1)  
Sampling date     < 0.001
 1987–2002 1484 (28) 451 (12) 1935 (22)  
 2003–2006 1254 (24) 984 (27) 2238 (25)  
 2007–2008 1135 (22) 1062 (29) 2197 (25)  
 2009–2011 1004 (19) 956 (26) 1960 (22)  
 Not available 378 (7) 247 (7) 625 (7)  
Seroconversion date     < 0.001
 1981–1996 607 (12) 160 (4) 767 (9)  
 1997–2003 497 (10) 373 (10) 870 (10)  
 2004–2006 261 (5) 410 (11) 671 (8)  
 2007–2011 299 (6) 443 (12) 742 (8)  
 Not known 3591 (68) 2314 (63) 5905 (66)  
  1. Abbreviations: MSM men who have sex with men, PWID people who inject drugs, MSW men who have sex with men and women