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Table 1 Selected characteristics of participants in three studies of HCV infection in San Francisco (N = 460)

From: Temporal changes in HCV genotype distribution in three different high risk populations in San Francisco, California

Variables UHS UFO SCOPE Total all studies
Total N 202 128 130 460
Gender N(%)¶     
Male 145 (72.5%) 88 (68.8%) 85 (65.4%) 318 (69.4%)
Female 55 (27.5%) 40 (31.2%) 45 (34.6%) 140 (30.6%)
Age (in years)#     
Median 47.0 22.3 45.0 43.0
IQR 42.3-50.0 19.9-25.0 40.8-49.0 28.0 - 48.0
Years of recruitment 1987-1998 2000-2007 2000-2007 1987-2007
HCV Genotypes* ¶    95 (77.9%) 326 (72.4%)
Type 1 161 (80.5%) 70 (54.7%) 10 (8.2%) 50 (11.1%)
Type 2 22 (11.0%) 18 (14.1%) 15 (12.3%) 69 (15.3%)
Type 3 15 (7.5%) 39 (30.5%) 2 (1.6%) 5 (11.1%)
Type 4 2 (1.0%) 1 (0.8%) 122 (100%) #***
  #*   #**  
HCV Genotypes*¶     
1 15 (7.4%) 32 (25.0%) 62 (47.7%) 110 (23.9%)
1a 76 (37.6%) 26 (20.3%) 3 (2.3%) 105 (22.8%)
1a/1b 5 (2.5%) 1 (0.8%) 4 (3.1%) 10 (2.2%)
1b 65 (32.2%) 11 (8.6%) 26 (20.0%) 101 (22.0%)
1/2 1 (0.5%) 0 (0.0%) 0 (0.0%) 1 (0.2%)
2 1 (5.0%) 5 (3.9%) 0 (0%) 5 (1.1%)
2a 0 (0.0%) 1 (0.8%) 0 (0.0%) 1 (0.2%)
2a/2c 4 (2.0%) 6 (4.7%) 2 (1.5%) 12 (2.6%)
2b 17 (8.4%) 6 (4.7%) 3 (2.3%) 26 (5.7%)
2b/3a 1 (0.5%) 0 (0.0%) 0 (0.0%) 1 (0.2%)
3a 15 (7.4%) 39 (30.5%) 15 (11.5%) 69 (15.0%)
4 1 (0.5%) 0 (0.0%) 1 (0.8%) 4(0.4%)
4c/4d 1 (0.5%) 1 (0.8%) 1 (0.8%) 3(0.7%)
Undetermined 0 (0.0%) 0 (0.0%) 8 (6.2%) 8 (1.7%)**
Ethnicity¶     
Caucasian 55 (27.5%) 97 (75.8%) 54 (41.5%) 205 (44.8%)
African Amer. 124 (62.0%) 2 (1.6%) 54 (41.5%) 180 (39.3%)
Latino 10 (5.0%) 7 (5.5%) 9 (6.9%) 26 (5.7%)
Asian 1 (0.5%) 1 (0.8%) 3 (2.3%) 5 (1.1%)
Other 10 (5.0%) 21 (16.4%) 10 (7.7%) 42 (9.2%)**
Education (1)¶     
< High School 56 (28.0%) 67 (52.8%) 34 (26.2%) 157 (34.4%)
>= High school 144 (72.0%) 60 (47.2%) 96 (73.8%) 300 (65.6%)**
  1. * Co-infected cases not included.
  2. ** Statistically significant difference (p < 0.05)
  3. # Age at the time of the interview
  4. ¶ Some cells do not conform to the total sample size totals due to missing data
  5. #* 2 people co-infected with different genotypes were not included
  6. #** 8 people with undetermined genotypes were not included
  7. #*** 10 people not included due to undetermined genotypes or to co-infection with different genotypes