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Table 3 Univariate comparison of knowledge improvement between the STI intervention arm and control arm

From: Improved knowledge and reported practice regarding sexually transmitted infections among healthcare providers in rural Vietnam: a cluster randomised controlled educational intervention

  STI intervention arm Control arm  
Mean score (n = 160) Mean score (n = 144)
Category Before After p * Difference Before After p * Difference p **
Sex          
  Male 37.4 48.7 0.000 11.3 33.0 41.1 0.000 8.0 0.261
  Female 37.2 48.2 0.000 11.1 32.51 42.0 0.000 9.5 0.212
Age (years)          
  <35 37.4 48.5 0.000 11.0 34.0 42.1 0.000 8.1 0.223
  35-50 35.6 48.5 0.000 12.9 34.0 43.3 0.000 9.4 0.107
  >50 39.5 48.2 0.000 8.7 29.1 38.7 0.000 9.6 0.694
Profesional education          
  Lower training (6–12 months) 32.5 43.8 0.002 11.3 23.7 36.0 0.000 12.3 0.897
  Intermediate training (2–3 yrs) 37.3 48.8 0.000 11.5 34.9 43.8 0.000 8.8 0.029
  University/post-graduate 41.8 50.3 0.001 8.6 36.4 40.3 0.044 3.9 0.261
Occupation          
  MD/AMDa 38.8 48.5 0.000 9.7 37.4 43.6 0.000 6.2 0.034
  Pharmacist 37.4 48.0 0.000 10.6 28.0 37.7 0.000 9.7 0.638
  Nurse/midwife 33.3 48.3 0.000 15.0 30.7 42.6 0.000 11.9 0.317
Working places          
  Commune health centre 38.9 48.7 0.000 9.8 37.0 44.1 0.000 7.2 0.082
  Village level 29.6 46.2 0.001 16.5 21.7 38.0 0.000 16.3 0.987
  Private clinic 41.4 51.1 0.012 9.8 21.8 27.6 0.091 5.9 0.154
  Pharmacy/drugstore 33.5 47.9 0.000 14.4 32.0 41.7 0.000 9.7 0.154
Total scores          
  Mean 37.2 48.4 0.000 11.2 32.7 41.7 0.000 9.0 0.207
  Median 38 50 0.000 11 33 44 0.000 8 0.142
  Minimum 12 19   −14 0 13   −10  
  Maximum 53 56   40 53 56   46  
  1. * Wilcoxon test (T-test for mean of total scores) to compare related samples (before and after intervention) of each arm, with p-value adjusted for ICC.
  2. **Mann–Whitney test (T-test for mean of total scores) to compare knowledge scores differences (after - before) between the intervention and the control arms, with p-value adjusted for ICC.
  3. aMD: Medical doctor AMD: assistant medical doctor.