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Table 3 Secondary outcomes for participants by treatment condition

From: The iPeer2Peer Program: a pilot randomized controlled trial in adolescents with Juvenile Idiopathic Arthritis

Variable Experimental group Control group Test statistics |Z| p Effect size
Mean (SD) Mean (SD) (Cohen’s d)
(n = 18) (n = 14)
Pain Intensity (average; range = 0–10, higher scores = higher pain intensity) 0.48 0.63 0.06
 Pre-treatment 2.39 (2.06) 2.43 (2.65)    
 Post-treatment 2.06 (1.83) 2.21 (1.97)    
Self-Efficacy (CASES; range = 11–55, higher scores = greater efficacy) 0.07 0.95 0.29
 Pre-treatment 37.28 (12.22) 39.57 (11.10)    
 Post-treatment 40.28 (12.52) 40.07 (12.83)    
PedsQL pain (range = 0–100, higher scores = lower problems) 0.63 0.53 0.04
 Pre-treatment 65.63 (21.68) 61.16 (26.19)    
 Post-treatment 67.36 (22.84) 62.05 (28.95)    
PedsQL activities (range = 0–100, higher scores = lower problems) 0.64 0.76 0.07
 Pre-treatment 87.50 (20.81) 87.14 (22.08)    
 Post-treatment 88.06 (18.88) 86.79 (22.33)    
PedsQL tx (range = 0–100, higher scores = lower problems) 0.98 0.33 0.33
 Pre-treatment 72.22 (21.69) 73.98 (14.25)    
 Post-treatment 70.44 (17.62) 76.28 (15.51)    
PedsQL worry (range = 0–100, higher scores = lower problems) 0.34 0.73 0.19
 Pre-treatment 62.50 (29.32) 55.95 (23.89)    
 Post-treatment 62.96 (29.60) 60.71 (30.74)    
PedsQL comm (range = 0–100, higher scores = lower problems) 0.33 0.74 0.23
 Pre-treatment 63.89 (26.51) 62.50 (19.27)    
 Post-treatment 63.89 (30.65) 67.26 (24.78)    
MEPS_total (range = 0–230, higher scores = higher perceived ability) 2.10 0.036 0.72
 Pre-treatment 130.56 (36.98) 137.64 (26.58)    
 Post-treatment 140.50 (30.31) 128.57 (30.93)    
MEPS_knowledge (range = 0–90, higher scores = higher perceived ability) 1.47 0.14 0.28
 Pre-treatment 45.56 (19.17) 45.57 (15.55)    
 Post-treatment 47.78 (15.39) 44.00 (12.34)    
MEPS_exercise (range = 0–40, higher scores = higher perceived ability) 0.56 0.53 0.51
 Pre-treatment 26.50 (9.34) 31.57 (8.81)    
 Post-treatment 27.56 (8.23) 28.79 (10.70)    
MEPS_pain (range = 0–60, higher scores = higher perceived ability) 2.11 0.035 0.74
 Pre-treatment 37.72 (11.87) 40.29 (11.45)    
 Post-treatment 41.22 (12.24) 35.50 (12.83)    
MEPS_social (range = 0–40, higher scores = higher perceived ability) 1.28 0.20 0.38
 Pre-treatment 20.78 (6.37) 20.21 (4.81)    
 Post-treatment 23.94 (6.49) 20.29 (6.91)    
  1. Note. Analysis has been adjusted to account for period of observation and baseline scores of the same measure
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