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Table 1 Characteristics of the Sample and its Subgroups at first clinic visit

From: Epidemiological and clinical features, response to HAART, and survival in HIV-infected patients diagnosed at the age of 50 or more

Characteristic Total Sample Group 1 (G1) Group 2 (G2) P-value ¶
Sample size (n) 455 36 419  
Sex: n (%)     
   Male 334(73.4) 33 (91.7) 301 (71.8) 0.127
   Female 121(26.6) 3 (8.3) 118 (28.2)  
HIV risk factor: n (%)     
   IDU * 285(62.9) 2 (5.7) 283 (67.7) < 0.001
   Heterosexual 123(27) 16 (44.4) 107 (25.5) 0.132
   MSM ** 23(5.1) 4 (11.1) 19 (4.5) < 0.999
   MSMW ‡ 8(1.8) 6 (16.7) 2 (0.5) < 0.001
   Unknown 16(3.5) 8 (22.2) 8 (2) < 0.001
AIDS criteria: n (%)     
   Yes § 57(12.5) 7 (19.4) 50 (11.9) < 0.999
   No 398(87.5) 29 (80.6) 369 (88.1)  
Previous treatment: n (%)     
   Yes 181(39.8) 2 (5.6) 179 (42.7) < 0.001
   No 274(60.2) 34 (94.4) 240 (57.3)  
CD4 (n° cel./mm3) 352.08 ± 294.10 180.83 ± 230.85 366.90 ± 294.52 < 0.001
CD8 (n° cel./mm3) 957.82 ± 597.10 963.38 ± 733.22 956.97 ± 583.73 < 0.999
Plasma viral load (log10) 4.09 ± 1.22 4.51 ± 1.18 4.05 ± 1.22 0.451
HBsAg #: n (%)     
   Positive 24(8.1) 1 (4.5) 23 (8.3) < 0.999
   Negative 274(91.9) 21 (95.5) 253 (91.7)  
Anti-HCV: n (%)     
   Positive 197(56.8) 3 (13.6) 194 (65.1) < 0.001
   Negative 123(43.2) 19 (86.4) 104 (34.9)  
  1. P value adjusted by Bonferroni procedure; * IDU: Injection drug user; ** MSM: Men who have sex with men; Fisher exact test; ‡ MSMW: Men who have sex with men or women; § AIDS criteria: Centers for Disease Control and Prevention (CDC) category C; # HBsAg: Hepatitis B superficial antigen