Table 3.

Psychometric Properties

Problem Score	Description of the Frequency of Items That Composed Each Problem Score and Examination of the Average Reported Rate of Concerns Among Cancer Patient Receiving Their Care at Comprehensive Cancer Center v Community-Based Oncologist Office							Cronbach's α	Factor/Correlation Analysis				Criterion Validity: Single Item Measure	Criterion Validity: 0-10 Multi-Item Rating Scale
	Score Range	% Missing		% Reporting Concern Across Each Item		Comprehensive Cancer Center (average % concern) (n = 89)	Private Practice (average % concern) (n = 117)		Item With Total		Item With Item
		Average	Range	Average	Range				Mean	Range	Mean	Range
Communication at the time of diagnosis problem score	0-20	1.6	0-5.8	12.4	1.9-35.4	17.3	9.1*	.84	0.41	0.160-0.563	0.22	0.004-0.863	0.41†	–0.53†
Communication at the time of treatment decision making problem score	0-15	2.5	1.3-6.9	13.0	3.8-36.9	18.5	9.7‡	.78	0.37	0.178-0.549	0.16	−0.001-0.460	0.36†	–0.60†
Cancer patient experience of treatments	0-10	3.6	1.9-6.9	8.1	1.9-15.6	13.0	5.4†	.76	0.47	0.171-0.660	0.22	0.002-0.581	0.16*	–0.43†

^*P < .05.

^†P < .01.

^‡P = .02.