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Table 5 Change in total confidence scores in sub-groups of intervention group between pre- and post-training

From: A randomised controlled trial of the effectiveness of a breastfeeding training DVD on improving breastfeeding knowledge and confidence among healthcare professionals in China

Items Number Pre-DVD
mean (SD)
(range 0–80)
Post-DVD
mean (SD)
(range 0–80)
ANOVA
(interaction effect)
ANOVA
(within-subject effect)
Age <30 14 68.43 (11.01) 69.36 (9.10) F(2,48) =1.25
p = 0.30
F(1,48) =23.63
p < 0.01
30–39 30 69.63 (9.35) 72.73 (7.33)
>39 7 69.00 (13.42) 73.43 (8.00)
Working hospital Provincial /municipal hospital 30 68.67 (10.38) 72.10 (8.58) F(1,67) =2.39
p = 0.13
F(1,67) =22.31
p < 0.01
County hospital 39 64.82 (11.76) 71.59 (9.97)
Job type Nurse 35 68.57 (9.73) 71.43 (8.50) F(2,66) =2.97
p = 0.06
F(1,66) =29.91
p < 0.01
Midwife 15 67.00 (11.09) 73.93 (7.27)
Doctor 19 62.26 (13.32) 70.84 (12.09)
Job title Senior or mid-grade 32 68.35 (11.11) 73.19 (7.49) F(1,67) =0.23
P = 0.64
F(1,67) =24.12
p < 0.01
Primary 37 64.34 (11.24) 70.22 (11.00)
Years since qualification ≤ 5 years 28 65.89 (11.45) 71.11 (7.63) F(1,66) =0.02
p = 0.89
F(1,66) =22.97
p < 0.01
>  5 years 40 66.77 (11.38) 72.30 (10.53)
Years working with BFa mothers ≤2 years 14 60.50 (12.79) 68.43 (8.29) F(2,64) =0.89
p = 0.42
F(1,64) =24.43
p < 0.01
3–10 years 24 67.21 (10.26) 72.46 (7.35)
> 10 years 29 68.41 (10.81) 72.41 (11.17)
Previous training on BF Yes 51 68.47 (10.01) 73.08 (7.34) F(1,67) =1.23
p = 0.27
F(1,67) =23.58
p < 0.01
No 18 60.89 (12.97) 68.22 (12.39)
  1. aBF Breastfeeding
  2. Cases were deleted where there was missing data on the dependent variable