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Table 5 Fidelity to MI during intervention

From: Effectiveness of a universal parental support programme to promote health behaviours and prevent overweight and obesity in 6-year-old children in disadvantaged areas, the Healthy School Start Study II, a cluster-randomised controlled trial

MI behaviour Counsellor A Counsellor B Threshold for acceptable MI
Global rating, “MI spirit”a 3.67 3.62 3.5
Reflection to questions ratiob 3.0 1.9 1
Open questions (%)c 53 19 50
Complex reflections (%)d 45 58 40
  1. MI consistent behaviour of the MI counsellor in relation to thresholds for acceptable MI
  2. Values are means of MI counsellor behaviour during MI sessions
  3. aHolistic evaluation of counsellors expression of MI spirit (equal collaboration with client about the change + evoking client speech about the change + supporting client’s autonomy regarding the change)
  4. bFrequency count of counsellor behaviour regarding the specific MI technique reflections in relation to questions; ratio between the total number of questions and reflections stated by the counsellor
  5. cFrequency count of counsellor behaviour regarding questions; percentage of open questions posed by the counsellor
  6. dFrequency count of counsellor behaviour regarding the specific MI technique reflections; percentage of complex reflections stated by the counsellor