Table 3.

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

	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

n = 194; minimum and maximum possible scores are given in brackets.