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Table 1 Pearson’s correlations between ZBI and IEQ scales

From: Assessment of the consequences of caregiving in psychosis: a psychometric comparison of the Zarit Burden Interview (ZBI) and the Involvement Evaluation Questionnaire (IEQ)

  ZBI (n = 223)
r (95% CI)
ZBI Personal Strain
r (95% CI)
ZBI Role Strain
r (95% CI)
IEQ 0.63 (0.54, 0.70) 0.51 (0.41, 0.60) 0.55 (0.46, 0.64)
IEQ-tension 0.69 (0.61, 0.75) 0.66 (0.57, 0.72) 0.57 (0.48, 0.65)
IEQ-supervision 0.40 (0.28, 0.51) 0.34 (0.21, 0.45) 0.32 (0.20, 0.43)
IEQ-worrying 0.55 (0.45, 0.63) 0.44 (0.32, 0.54) 0.54 (0.44, 0.62)
IEQ-urging 0.43 (0.32, 0.53) 0.29 (0.16, 0.40) 0.38 (0.27, 0.49)
  1. ZBI Zarit Burden Interview, r Pearson’s correlation coefficient, CI confidence interval, IEQ Involvement Evaluation Questionnaire