Five hundred and ninety-five patients (sex ratio M/F 4.36, mean age 43 [+ or -] 12, and range 18-69) participated in the following steps: (1) criterion validity of POAM-P/F "avoidance" was assessed by its correlation to the TSK; POAM-P/F "pacing" and "overdoing" subscores were compared to the corresponding subscores of the CPCI.
Criterion validity was evaluated by (1) the Pearson correlation coefficient between the POAM-P/F scores of "avoidance," "pacing," and "overdoing" subscales and the TSK score (all patients) and the corresponding CPCI subscores (94 patients), respectively, and (2) a Principal Component Analysis (PCA) run with POAMP-P/F avoidance, POAMP-P/F pacing, POAMP-P/F overdoing, TSK, HASD-anxiety, HADS-depression, PCS, BPI-severity, BPI-interference, age, and number of surgeries.
Men had slightly higher avoidance scores than women (28.8 [+ or -] 8.4 versus 27.1 [+ or -] 8.6) and slightly lower overdoing scores (20.7 [+ or -] 8.7 versus 22.3 [+ or -] 9.3), with a substantial trend toward significance (p = 0.06 and 0.07, resp.).
The correlation between the "avoidance" score of the POAM-P/F and TSK was highly significant (r = 0.508, p < [10.sup.-4]; see Table 1), as well as the correlation between the "pacing" and "overdoing" scores of the POAMP/F and the corresponding CPCI subscores (r = 0.307, p < [10.sup.-2], and r = 0.312, p < [10.sup.-2]).
ICC were 0.881 [[0.821-0.921].sub.95%] for avoidance, 0.865 [[0.799-0.911].sub.95%] for pacing, and 0.731 [[0.613-0.818].sub.95%] for overdoing. Cronbach's alpha coefficients were 0.877, 0.891, and 0.846 for avoidance, pacing, and overdoing subscales, respectively.