Table 1.

Variables used in the analyses: mean/% and standard deviation

	Mean/%	Sd	Type of data source
Dependent
Adherence to guideline	58.7%		Electronic medical records
Independent
Practice level (n = 83)
% publicly insured (per practice)	65.8%	10.1%	Practice administration
% elderly (per practice)	6.0%	2.8%	Practice administration
% ethnic minorities (per practice)	6.3%	11.7%	Patient questionnaire
Nat. logarithm % ethnic minorities	-3.38	1.4	Patient questionnaire
% self-rated health poor (per practice)	19.0%	5.2%	Patient questionnaire
Practice type			National database
Single-handed	57.8%
Dual practice	20.5%
Group	12.1%
Health centre	9.6%
Urbanization			National database
Very urban	20.5%
Urban	24.1%
Suburban	16.8%
Rural	20.5%
Very rural	18.1%
Dispensing practice	10.9%		GP questionnaire 1
GP-level (n = 130)
Workload	114.6	35.4	Electronic medical records
Age	47.4	6.15	National database
Sex (female)	21.5%		National database
List size	2018.3	545.6	Practice administration and GP questionnaire 1
Hours of CME per week	3.2	3.4	Diaries
Satisfaction with available time	2.9	0.7	GP questionnaire 2
Patient level (n = 98,577)
Age	39.8	24.0	Practice administration
Sex (female)	56%		Practice administration
Public insurance	71%		Practice administration
Self-rated health poor	18.3%		Patient questionnaire
Self-rated health unknown	22.1%		Patient questionnaire
Non-western ethnic minority	4.6%		Patient questionnaire
Ethnicity unknown	17.8%		Patient questionnaire
GAI level (n = 41)
About referrals	32.0%		Electronic medical records
Short-term time investment greater	32.8%		Expert panel
Short-term time investment smaller	22.1%		Expert panel
Long-term time investment greater	19.1%		Expert panel
Long-term time investment smaller	28.6%		Expert panel