TABLE 2.

Means and Standard Errors of the CTS Physician Survey Sample: All Patient Care Physicians and Physicians in Panel Sample

	Cross-Sectional Sample (All 4 Survey Rounds)	Panel Sample (Baseline Characteristics)
Sample size	35,267	15,966
Dependent variables
Percentage providing any charity care	72.7 (0.48)	74.6 (0.57)
Percentage not accepting new Medicaid patients	20.2 (0.62)	19.5 (0.80)
Independent variables
Male	78.5 (0.40)	80.0 (0.54)
Primary care physician	38.9 (0.60)	40.1 (0.72)
Medical specialist	34.5 (0.53)	33.4 (0.62)
Surgical specialist	26.6 (0.59)	26.5 (0.71)
Board certified	88.6 (0.65)	88.3 (0.67)
In practice 5 years or less	15.3 (0.32)	20.7 (0.63)
In practice 6 to 10 years	18.8 (0.31)	19.7 (0.46)
In practice 11 to 25 years	48.2 (0.48)	46.7 (0.67)
In practice > 25 years	17.6 (0.40)	12.9 (0.49)
Owner of practice	58.7 (0.76)	57.5 (0.89)
Non-office-based setting	44.4 (0.66)	43.3 (0.83)
Percentage of capitated revenue	15.1 (0.52)	16.9 (0.66)
Percentage of revenue from Medicaid	15.1 (0.32)	14.4 (0.37)
Practice income, in 2003 dollars (thousands)	203 (1.9)	199 (2.1)
Hours of patient care in past week	45.2 (0.16)	45.5 (0.20)
Number of weeks practicing medicine in past year	47.8 (0.04)	47.9 (0.04)
Percentage of uninsured in site	11.7 (0.44)	11.7 (0.50)
Percentage enrolled in Medicaid/SCHIP in site	9.2 (0.25)	8.1 (0.26)
Medicaid fee in state (relative to Medicare)	0.70 (0.01)	0.69 (0.01)
Number of physicians per capita in county	0.29 (0.005)	0.29 (0.005)
Hospital beds per capita in county	0.36 (0.009)	0.37 (0.009)

Note: Samples exclude physicians who worked fewer than 20 hours or more than 80 hours in their last week of practice or who practiced fewer than 32 weeks in the previous year. Standard errors are in parentheses.

Source: Community Tracking Study Physician Surveys, 1996/1997, 1998/1999, 2000/2001, 2004/2005.