Table 3.

Quality domains for which indicators were developed within the four studies

Quality domain	Sub-domain	Indicators developed (n)
		McGlynn et al. [10]	Marshall et al. [9]	Leas et al. [12]	Ferrari et al. [11]
Structure		0	0	0	0
Process	Diagnosis	13	0	5	0
	Treatment	8	4	6	0
	Referral for care	0	1	0	0
Outcome	Headache severity and frequency	0	0	0	6
	Disability	0	0	0	0
	Quality of life	0	0	0	0
	Satisfaction with care	0	0	0	0
	Uptake of care	0	0	9	3