Table 2

Physician Trust in the Patient, Pratt Matrix D

Item	Description (Root: “How confident are you that this patient will…”)	P		S		C		D

		F1	F2	F1	F2	–	F1	F2
1	Provide all the medical information you need?	.85	.12	.92	.57	.85	0.92	0.08
4	Let you know when there has been a major change in his or her condition?	.91	−.10	.86	.38	.74	1.06	−0.05
5	Tell you about all medications and treatments he or she is using?	.83	.10	.89	.54	.80	0.93	0.07
6	Understand what you tell him/her?	.73	.09	.78	.47	.61	0.93	0.07
9	Follow the treatment plan you recommend?	.86	.08	.90	.53	.82	0.94	0.05
11	Be actively involved in managing his/her condition/problem?	.94	−.09	.89	.41	.80	1.05	−0.05
12	Tell you if he/she is not following the treatment plan?	.86	.00	.85	.45	.73	1.00	0.00
14	Respect your time?	.01	.89	.48	.89	.80	0.01	0.99
15	Respect personal boundaries?	.00	.95	.50	.96	.91	0.00	1.00
16	Not make unreasonable demands?	−.02	.99	.50	.98	.96	−0.01	1.01
17	Not manipulate the office visit for secondary gain (eg, for inappropriate disability certification or prescription of controlled substances)?	.12	.82	.55	.88	.79	0.08	0.92
18	Keep his or her appointments?	.69	.19	.79	.56	.65	0.84	0.16

C = communality (the percentage of variance in each item explained by the 2 factors); D = P × S/C (the Pratt D value, the proportion of the explained variance attributable to each factor; a measure of the relative importance of each factor to a given item); F1 = Factor 1; F2 = Factor 2; P = pattern coefficient (the equivalent of the standardized partial regression coefficient, ie, slope of a factor on the item); S = structure coefficient (the equivalent of the simple Pearson correlation between an item and each factor).
Note: Factor 1 (Patient Role) is composed of items 1, 4, 5, 6, 9, 11, 12, and 18; Factor 2 (Respect for Boundaries) is composed of items 14, 15, 16, and 17.