Table 5.

ROC-formula of the best combination of pain drawing criteria

Formula to compute the score	Mean ± SD (Range)	OR/SD (95% CI)	Log likelihood	p-value
55 points multiplied with the total number of marks plus	748 ± 700 (81 4397)	1114 (62, 20’132)	- 25	- 0.001
32.2 points multiplied with the length of the longest mark plus
187 points if symmetric patterns are present

This table shows the properties of the best pain drawing criteria after combining them to one single continuous variable. The combination to one variable is necessary to obtain one single receiver operating characteristic curve including the diagnostic properties of all three criteria.