Table 4

Probability of GP users’^a use of specialist services, according to duration of the GP–patient relationship and frequency of GP visits

	Outpatient specialist services, OR (95% CI)	Somatic outpatient specialist services, OR (95% CI)	Psychiatric outpatient specialist services, OR (95% CI)	Hospitalisation, OR (95% CI)
Duration of the GP–patient relationship (GP duration)^{^b,^c}	n = 8270	n = 8278	n = 7466	n = 8611
0–2 years	1.00	1.00	1.00	1.00
>2 years	0.81 (0.71 to 0.92)	0.84 (0.74 to 0.95)	0.83 (0.62 to 1.09)	0.76 (0.64 to 0.90)

Frequency of GP visits during previous year (GP frequency)^{^c,^d}	n = 8857	n = 8863	n = 7996	n = 9235
<3 visits	1.00	1.00	1.00	1.00
≥3 visits	2.43 (2.22 to 2.66)	2.31 (2.11 to 2.53)	2.61 (2.04 to 3.33)	2.64 (2.30 to 3.03)

↵a ≥1 GP visits during the previous year.
↵b Multivariate analysis with GP duration as main independent variable.
↵c Adjusted for age, sex, marital status, household income, education, and self-rated health.
↵d Multivariate analysis with GP frequency as main independent variable. OR = odds ratio.