Table 2. Comparison of utilization among the different groups, showing peak risk ratios (RR).

	FSS group versus control group	PBC group versus NP group	NP group versus CP group
	RR (95% CI)	RR (95% CI)	RR (95% CI)
Radiography	1.48 (1.46–1.50)	1.46 (1.44–1.48)	1.15 (1.12–1.17)
Computed tomography	2.01 (1.94–2.08)	1.82 (1.77–1.82)	1.20 (1.14–1.26)
Magnetic resonance imaging	1.91 (1.87–1.96)	1.77 (1.74–1.81)	1.26 (1.22–1.30)
Surgery	1.30 (1.27–1.34)	1.61 (1.56–1.65)	1.24 (1.18–1.30)
Costs	1.49 (1.48–1.50)	1.37 (1.36–1.38)	1.11 (1.10–1.11)

FSS, Functional somatic syndrome; PBC, primary care physician-based care (patients treated and coordinated by their primary care physician); CP coordinated patients (treated by specialist, referral by primary care physician mandatory); NP, non-coordinated patients (treated solely by specialist, no referral)