Dissertation - World Federation of Music Therapy

Statistical analysis of QLQ-C30 results
The variability of effect between subjects suggested that no significant effects would
be found in either the functional scales or the symptom scales when analysing
differences in scores over time. A two-tailed Wilcoxon match pairs test was computed
to compare pre-test Quality of Life sub-scale scores of the QLQ-C30 with post-test
and follow-up scores. The results indicated that the QoL scores were not significantly
higher at post-test when compared with pre-test (Z = -1,367, P= .172) or at follow-up
when compared with pre-test (Z = -,406, p = .684).
Effects sizes were calculated, and found at post-test to be a small to medium effect
(Cohen’s d= .49), with a small effect at follow-up (Cohen’s d = .32).
5.3 Effects of BMGIM on quality of life. SOC
Participants reported quality of life by completing Antonovsky’s SOC, a 29 items
questionnaire focusing on QoL (understood as a global attitude towards life), using a
7 point Likert scale (at Pre-test, Post-test, and Follow-Up).
Results – descriptive statistics
Raw scores for each of the six participants are given in table 5.3 together with
standard deviations calculated for all participants at the three data points.
Table 5. 3 SOC raw scores and standard deviations at pre-test, post-test and
follow-up.
Participant Pre-test score Post-test score Follow-up score
WIFU 146 175 178
INLA 138 143 140
PIJØ 145 151 148
ESMA 132 153 141
SAAA 150 152 151
ANHO 94 122 106
Mean 134,6 147,5 144
Standard deviation 20,8 17,4 23,2
153