Table 2:

Distribution of characteristics of 1457 patients across the 37 practices

Characteristic	Mean or mean proportion (SD)
Age of patients per practice, yr, mean	59.1 (6.5)
Female, %	56.5 (10.9)
Perceived economic status, %
Comfortable	22.2 (10.1)
Sufficient income	56.6 (9.3)
Poor or very poor	21.2 (10.0)
No. of patients with at least 1 of the target chronic illnesses per practice, mean	25 (11)
No. of patients with at least 1 of the target episodic illnesses per practice, mean	16 (7)
Burden of comorbidity by ambulatory care group classification (out of 5)	3.14 (0.35)
12-Item Short Form Survey, physical	41.0 (3.3)
12-Item Short Form Survey, mental	48.7 (3.8)
Interdisciplinary follow-up at the practice (chronic-care patients only), %	36.6 (27.9)
Follow-up by a specialist physician, %	42.5 (11.3)
No. of years at the practice, no.	12.5 (5.2)
Visits at the practice with the regular physician, %	81.8 (16.7)

Note: SD = standard deviation.