Table 1.

Variations in quality of care: summary clinical, access, and interpersonal scores (maximum=100)

Dependent variable	Mean score	Standard deviation	Range	Intracluster correlation coefficient
Angina	55.0	6.74	41-67	0.14
Asthma	50.1	12.33	25-73	0.30
Type 2 diabetes	62.1	11.84	33-83	0.37
Access	60.7	9.21	44-79	0.079
Continuity of care	66.5	11.07	42-87	0.081
Treatment by receptionists	68.2	9.19	45-85	0.057
Communication	72.0	6.34	60-88	0.025
Interpersonal care	69.2	6.84	50-83	0.030
Doctor's knowledge of patient	59.1	7.10	43-76	0.028
Nursing care	75.8	7.71	48-88	0.015
Overall satisfaction	74.7	5.93	59-88	0.022