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Table 3 Proportions and odds ratios of good retention by study arm and socio-demographic characteristics

From: A randomized trial to assess retention rates using mobile phone reminders versus physical contact tracing in a potential HIV vaccine efficacy population of fishing communities around Lake Victoria, Uganda

  All follow up visits
Good retention (5/6 of 6 visits) n (%) Odd Ratios (95% CI)
Yes No Unadjusted Adjusted
All participants 495 (74.9) 166 (25.1)
Study arm
 Phone tracing 235 (71.2) 95 (28.8) 1 (reference) 1
 Physical tracing 260 (78.5) 71 (21.4) 1.48 (1.04–2.11) 1.56 (1.08–2.26)
Sex
 Male 295 (73.2) 108 (26.8) 1 1
 Female 200 (77.5) 58 (22.5) 1.26 (0.87–1.82) 1.70 (0.99–2.91)ϕ
Age (years)
 15–19 31 (63.3) 18 (36.7) 1 1
 20–24 134 (76.6) 41 (23.4) 1.90 (0.96–3.74) 1.99 (0.98–4.04)ϕ
 25–34 238 (74.4) 82 (25.6) 1.68 (0.89–3.17) 1.54 (0.78–3.04)
 35–49 92 (78.6) 25 (21.4) 2.14 (1.03–4.43) 1.67 (0.76–3.67)
Education
 None 25 (73.5) 9 (26.5) 1 1
 Primary 284 (74.9) 95 (25.1) 1.08 (0.48–2.39) 1.19 (0.52–2.75)
 Secondary and beyond 173 (75.2) 57 (24.8) 1.08 (0.48–2.44) 1.31 (0.55–3.10)
Occupation
 Fishing/Fishing relateda 204 (75.6) 66 (24.4) 1 1
 Shop/Market 35 (76.1) 11 (23.9) 1.03 (0.49–2.14) 0.75 (0.32–1.75)
 Bar/Lodge/Hotel 49 (70.0) 21 (30.0) 0.75 (0.42–1.35) 0.60 (0.28–1.27)
 Farming 61 (83.6) 21 (16.4) 1.64 (0.83–3.24) 1.29 (0.63–2.66)
 Housewife 50 (75.8) 16 (14.2) 1.01 (0.54–1.89) 0.76 (0.33–1.72)
 Othersb 96 (70.6) 40 (29.4) 0.78 (0.49–1.23) 0.76 (0.47–1.24)
Community location
 Mainland 251 (71.1) 102 (28.9) 1 1
 Island 244 (79.2) 64 (20.8) 1.55 (1.08–2.22) 1.62 (1.08–2.43)
Duration of stay (years)
 Less than 1 51 (60.0) 34 (40.0) 1 1
 – 4 188 (72.6) 71 (27.4) 1.76 (1.06–2.95) 1.70 (0.99–2.92)ϕ
 – 10 155 (80.7) 37 (19.3) 2.79 (1.59–4.90) 2.88 (1.58–5.28)
 More than 10 101 (80.8) 24 (19.2) 2.80 (1.51–5.22) 3.46 (1.78–6.73)
Marital status
 Not married 152 (72.7) 57 (27.3) 1 1
 Married monogamous 246 (75.7) 79 (24.3) 1.17 (0.78–1.73) 0.93 (0.59–1.44)
 Married polygamous 97 (76.4) 30 (23.6) 1.21 (0.73–2.02) 0.88 (0.49–1.55)
  1. Statistically significant at p < 0.05, ϕBorderline statistical significance 0.06<p > 0.05, aFishing, fishmongers, fish processing, boat maker/owner, bConstruction/Mechanic/Government/Clerical