Table 2.

Physicians' Diagnostic Performance When Using the Quick Medical Reference (QMR) Decision Support System (N = 108)

Type (No.) of Cases	Accuracy Mean (SD)	Relevance Mean (SD)	Comprehensiveness Mean (SD)
Difficult (4)	0.32* (0.18)	0.56* (0.15)	0.22* (0.08)
Easy (4)	0.67 (0.18)	0.67 (0.18)	0.25 (0.08)
High information quality (4)	0.75* (0.18)	0.68* (0.15)	0.25* (0.09)
Low information quality (4)	0.24 (0.20)	0.55 (0.18)	0.22 (0.08)
Difficult, high information quality (2)	0.59 (0.33)	0.64 (0.18)	0.26** (0.12)
Difficult, low information quality (2)	0.05 (0.15)	0.48 (0.23)	0.19 (0.09)
Easy, high information quality (2)	0.92 (0.18)	0.73 (0.22)	0.24 (0.09)
Easy, low information quality (2)	0.43 (0.33)	0.62 (0.19)	0.25 (0.12)
Total (8)	0.50 (0.14)	0.61 (0.14)	0.23 (0.06)

^*P < 0.01, analysis of variance, significant main effect of case difficulty and information quality.

^**P < 0.01, analysis of variance, significant interaction effect.