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Table 2 Descriptive mean score, Standard deviations on the scales of life satisfaction, health, social support and Beck Depression Inventory at baseline and after 12 months, n total = 92 *

From: A randomized controlled trial of a senior centre group programme for increasing social support and preventing depression in elderly people living at home in Norway

Instruments and scoring range Baseline After 12 months Differences Baseline-12 months Effect size
  Groups n Mean score S.D. n Mean score S.D. n Mean change S.D. Cohen’s d
Life satisfaction Intervention 37 3.65 0.82 37 3.59 0.76 37 -0.06 0.78 0.22
1-5 Control 55 3.84 0.71 54 3.61 0.79 54 -0.22 0.74  
Health Intervention 36 2.44 0.65 37 2.24 0.72 36 -0.20 0.74 0.07
1-4 Control 55 2.55 0.60 55 2.40 0.63 55 -0.15 0.52  
Social support Intervention 37 9.32 2.02 37 9.97 2.05 37 0.65 1.46 0.12
3-14 Control 53 9.21 2.00 54 9.69 2.09 52 0.48 1.72  
BDI Intervention 36 10.14 6.63 37 10.70 5.95 36 0.56 5.45 0.03
  Control 53 8.70 4.85 55 9.44 4.19 53 0.74 4.72  
  1. * n differs, both in intervention group and in control group because not all the participants answered all the questions at both baseline and after 12 months.