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Table 3 Involvement Evaluation Questionnaire (IEQ) totals and domains: distribution of scores and internal consistency

From: Caregiving in severe mental illness: the psychometric properties of the Involvement Evaluation Questionnaire in Portugal

  Sum item scores (0 to 4) Cronbach's α
  Minimum to maximum Mean (95% CI) SEM SD Coefficient 95% CI (unilateral)
Tension 0 to 31 (0 to 36) 7.92 (7.19 to 8.64) 0.37 5.11 0.74 ≥ 0.69
Supervision 0 to 21 (0 to 24) 2.70 (2.21 to 3.18) 0.25 3.45 0.71 ≥ 0.65
Worrying 0 to 24 (0 to 24) 13.79 (13.04 to 14.54) 0.381 5.31 0.73 ≥ 0.68
Urging 0 to 27 (0 to 32) 8.56 (7.71 to 9.41) 0.43 6.01 0.74 ≥ 0.69
IEQ sum score 0 to 84 (0 to 108) 30.23 (28.16 to 32.31) 1.05 14.65 0.87 ≥ 0.85
  1. n = 194; minimum and maximum possible scores are given in brackets.