Table 5.

Use of a Basic Electronic Health Record System

	2008 Health Tracking Physician Survey (HTPS)				2008 National Ambulatory Medical Care Survey (NAMCS)
	Full Model Marg. Eff.		Reduced Model Marg. Eff.		Full Model Marg. Eff.		Reduced Model Marg. Eff.
Specialty
Internal medicine/general or family practice	[R]		[R]		[R]		[R]
Pediatrics	−7.75%	***	−8.20%	***	−0.11%		0.01%
OB/GYN	−4.93%	**	−4.98%	**	−3.91%		−4.07%	*
Psychiatry	−14.23%	***	−14.35%	***	−6.08%	***	−6.03%	***
Other medical specialty	−3.77%	***	−3.56%	***	0.02%		0.04%
Other surgery specialty	−9.39%	***	−8.70%	***	−4.60%	**	−4.55%	**
Practice type
Solo/two physicians†	−15.34%	***	−16.25%	***	−5.80%	***	−5.57%	***
HMO or other prepaid practice‡,¥	20.23%	***	19.94%	***	14.91%	**	18.87%	***
Community health center	n.a.				−0.56%		0.24%
Other practice type	[R]		[R]		[R]		[R]
Revenue from Medicare
50% or less	[R]		[R]		[R]		[R]
More than 50%	−5.98%	***	−6.36%	***	−6.66%	***	−6.63%	***
Missing	n.a		n.a		12.87%		10.87%
Revenue from Medicaid
50% or less	[R]		[R]		[R]		[R]
More than 50%	−1.71%		−1.43%		−6.12%	***	−5.97%	**
Missing	n.a		n.a		−5.21%		−4.72%
Number of managed care contracts
None	−2.31%		−2.78%	*	−7.54%	***	−7.43%	***
1 or more	[R]		[R]		[R]		[R]
Missing	n.a		n.a		−3.82%		−3.49%
Female	−2.57%	**			n.a
Race/ethnicity
Non-Hispanic White	[R]				n.a
Hispanic	−0.76%				n.a
Non-Hispanic Black	−1.44%				n.a
Asian	−2.76%	*			n.a
Other	−5.18%	*			n.a
Year started practice
1975 or earlier	−14.66%	***			n.a
1976–1990	−7.70%	***			n.a
1991–2000	−4.40%	***			n.a
2001 or later	[R]				n.a
Geographic region
West	n.a.				[R]
Northeast	n.a.				−1.10%
Midwest	n.a.				−3.97%	**
South	n.a.				−3.20%	*
Non-MSA	n.a.				1.14%

Note: HMO: health maintenance organization; MSA: metropolitan statistical area.

^†In the NAMCS, only solo practice was included.

^‡In the HTPS, only HMO-setting was asked.

^¥Estimate from the NAMCS was based on fewer than 30 unweighted observations.

^***p < .01

^**p < .05

^*p < .10