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Table 3 Extended multivariable analyses, separating the Green Book risk factor exposure variable into four separate variables

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

Variable OR (95% CI)
Gender p = 0.005
 Male (base)
 Female 2.72 (1.35–5.48)
Age (linear) p = 0.12
 19–29 (base)
 per 10 year increase 1.22 (0.91–1.64)
Ethnicity p = 0.89
 White C/E European 1.12 (0.53–2.37)
 White Other (base)
 Black African 1.32 (0.36–4.86)
 Black Other 0.74 (0.31–1.78)
 Mixed/Other 0.82 (0.30–2.28)
Birthplace p = 0.66
 UK born (base)
 Not UK born 0.83 (0.38–1.81)
Homelessness p = 0.62
 Never (base)
 History 0.72 (0.29–1.81)
 Current 1.06 (0.45–2.50)
Excessive alcohol consumption p = 0.53
 No (base)
 Yes 0.72 (0.38–1.31)
History of smoking p = 0.17
 No (base)
 Yes 0.44 (0.13–1.45)
Drug Use p = 0.004
 No drug use (base)
 Non IDU (History or current) 0.55 (0.23–1.32)
 History of IDU 0.17 (0.06–0.49)
 Current IDU 0.23 (0.08–0.62)
Imprisonment/Arrested p = 0.03
 Neither 1.79 (0.68–4.69)
 Arrested but not imprisoned 2.59 (1.27–5.29)
 Imprisoned (base)
History of liver disease p = 0.14
 No (base)
 Yes 1.97 (0.81–4.79)
HCV status p = 0.54
 Negative (base)
 Positive 1.47 (0.67–3.24)
  1. Model presents a complete case analysis where only participants with no missing data were included (n = 283). Likelihood ratio tests were used to calculate p-values. *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. C/E – Central and Eastern; CI confidence interval, HCV Hepatitis C virus, IDU injecting drug use, OR odds ratio; p = p-value