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Table 1 Baseline characteristics of the 346 participants, by number of doses of HBV vaccine

From: Hepatitis B vaccination uptake in hard-to-reach populations in London: a cross-sectional study

Variables Overall Incomplete vaccination status Complete vaccination status Unknown vaccination status
# Col % # Row % # Row % # Row %
Overall 346 100 130 37.6 181 52.3 35 10.1
Gender
 Female 82 23.7 43 52.4 30 36.6 9 11.0
 Male 264 76.3 87 33.0 151 57.2 26 9.8
 Unknown 0 0.0 0 0 0
Age
 19–29 53 15.3 24 45.3 25 47.2 4 7.6
 30–39 86 23.9 28 32.6 51 59.3 7 8.1
 40–49 140 41.5 48 34.3 81 57.8 11 7.9
 50–59 60 17.9 25 41.7 22 36.7 13 21.7
 60–69 7 2.2 5 71.4 2 28.6 0 0.0
 Unknown 0 0.0 0 0 0
Ethnicity
 White C/E European 82 23.7 33 40.2 37 45.1 12 14.6
 White Other 160 46.8 53 33.1 89 55.6 18 11.3
 Black African 25 7.2 16 64.0 9 36.0 0 0.0
 Black Other 45 13.0 16 35.6 27 60.0 2 4.4
 Mixed/Other 32 9.2 11 34.4 18 56.3 3 9.4
 Unknown 2 0.6 1 50.0 1 50.0 0 0.0
Birthplace  
 Not UK born 83 24.0 38 45.8 33 39.8 12 14.6
 UK born 263 76.0 92 35.0 148 56.2 23 8.7
 Unknown 0 0.0 0 0 0
Drug use
 No drug use 68 19.7 44 64.7 14 20.6 10 14.7
Non-IDU (History or current) 101 29.2 43 42.6 44 43.6 14 13.9
 History of IDU 98 28.3 22 22.5 67 68.4 9 9.18
 Current IDU 78 22.5 20 25.6 56 71.8 2 2.6
 Unknown 1 0.0 1 100.0 0 0
Homelessness  
 Never 51 14.7 26 51.0 21 41.2 4 7.8
 History 104 30.1 29 27.9 63 60.6 12 11.5
 Current 185 53.5 72 38.9 94 50.8 19 10.3
 Unknown 6 1.2 3 50.0 3 50.0 0
Imprisonment/Arrested
 Neither 45 13.0 28 62.2 12 26.7 5 11.1
Arrested but not imprisoned 78 22.5 40 51.3 22 28.2 16 20.5
 Imprisoned 221 64.2 61 27.6 146 66.1 14 6.3
 Unknown 2 0.6 1 50.0 1 50.0 0
Excess alcohol consumption
 No 203 58.7 80 39.1 104 51.2 19 9.4
 Yes 141 40.8 50 35.5 75 53.2 16 11.4
 Unknown 2 0.6 0 2 100.0 0
Smoking History
 Absent 28 8.1 18 64.3 5 17.9 5 17.9
 Present 318 91.9 112 35.2 176 55.4 30 9.4
 Unknown 0 0 0 0 0
Liver Disease
 No 282 81.5 100 35.5 155 55.0 27 9.6
 Yes 43 12.4 18 41.9 19 44.2 6 14.0
 Unknown 21 6.1 12 57.1 7 33.3 2 9.5
HCV status
 Negative 247 71.4 105 42.5 114 46.2 28 11.3
 Positive 95 27.4 24 25.3 65 68.4 6 6.3
 Unknown 4 2.7 1 25.0 2 50.0 1 25.0
Green Book risk factors*
 0 77 22.3 45 58.4 17 22.1 15 19.5
 1 89 25.7 36 40.5 46 51.7 7 7.9
 2 or more 157 45.4 36 22.9 110 70.1 11 7.0
 Unknown 23 6.6 13 56.5 8 34.8 2 8.7
  1. Complete vaccination status was recorded as three or more doses. C/E Central and Eastern, Col column, IDU injecting drug use, HCV Hepatitis C virus
  2. *Green Book risk factors include current or intermittent drug use (history of IDU and current IDU), being imprisoned, having liver disease and additionally being infected with HCV on top of having liver disease