Table 4.

Risk ratio (RR) of referral to PRO-based follow-up 6, 12, and 18 months after the first visit at Department of Neurology, Aarhus University Hospital according to register determinants (N = 802)

	6-month follow-up		12-month follow-up		18-month follow-up
	Crude RR	Adjusted RRa	Crude RR	Adjusted RRa	Crude RR	Adjusted RRa
Age, years
15–24	Ref	Ref	Ref	Ref	Ref	Ref
25–39	1.04 (0.63–1.70)	0.99 (0.57–1.71)	0.91 (0.59–1.40)	0.85 (0.54–1.36)	0.90 (0.59–1.36)	0.84 (0.54–1.30)
40–59	1.08 (0.68–1.71)	0.98 (0.58–1.65)	1.02 (0.69–1.50)	0.94 (0.60–1.46)	1.01 (0.70–1.47)	0.92 (0.60–1.40)
60–69	1.08 (0.65–1.80)	0.77 (0.43–1.37)	0.98 (0.63–1.52)	0.83 (0.50–1.37)	0.85 (0.55–1.30)	0.73 (0.45–1.19)
70–99	1.01 (0.64–1.60)	0.92 (0.52–1.62)	0.90 (0.60–1.34)	1.06 (0.62–1.78)	0.84 (0.57–1.24)	0.95 (0.58–1.58)
Gender
Female	Ref	Ref	Ref	Ref	Ref	Ref
Male	1.32 (0.97–1.80)	1.35 (0.95–1.92)	1.29 (0.99–1.69)	1.28 (0.96–1.69)	1.39 (1.07–1.81)	1.36 (1.03–1.79)
Cohabitation status
Living with a partner/family	Ref	Ref	Ref	Ref	Ref	Ref
Living alone	0.61 (0.43–0.86)	0.60 (0.41–0.89)	0.55 (0.40–0.75)	0.55 (0.39–0.78)	0.58 (0.43–0.79)	0.63 (0.45–0.89)
Education
High (> 12 years)	Ref	Ref	Ref	Ref	Ref	Ref
Medium (10–12 years)	1.03 (0.70–1.51)	0.97 (0.66–1.46)	1.25 (0.88–1.78)	1.22 (0.86–1.74)	1.20 (0.85–1.69)	1.15 (0.82–1.62)
Low (< 10 years)	0.53 (0.34–0.81)	0.46 (0.28–0.75)	0.65 (0.44–0.96)	0.62 (0.41–0.94)	0.69 (0.47–1.01)	0.65 (0.44–0.97)
Household income
High	Ref	Ref	Ref	Ref	Ref	Ref
Medium	0.46 (0.32–0.67)	0.61 (0.39–0.94)	0.52 (0.38–0.71)	0.69 (0.48–1.00)	0.50 (0.37–0.68)	0.64 (0.44–0.93)
Low	0.49 (0.34–0.71)	0.59 (0.38–0.90)	0.43 (0.30–0.60)	0.51 (0.35–0.75)	0.41 (0.29–0.57)	0.47 (0.32–0.68)
Labour market affiliation
Self-supporting	Ref	Ref	Ref	Ref	Ref	Ref
Normal retirement	0.71 (0.49–1.01)	0.69 (0.42–1.13)	0.74 (0.54–1.02)	0.86 (0.55–1.37)	0.65 (0.48–0.89)	0.77 (0.49–1.20)
Temporary social benefits	0.69 (0.47–1.03)	0.68 (0.45–1.05)	0.78 (0.55–1.09)	0.79 (0.56–1.13)	0.68 (0.49–0.95)	0.69 (0.49–0.96)
Permanent social benefits	0.38 (0.22–0.67)	0.55 (0.29–1.04)	0.44 (0.27–0.71)	0.60 (0.35–1.02)	0.39 (0.24–0.62)	0.51 (0.31–0.84)
Co-morbidity (Charlson Index)
Low 0	Ref	Ref	Ref	Ref	Ref	Ref
Medium 1–2	0.79 (0.54–1.14)	0.73 (0.48–1.12)	0.72 (0.52–1.00)	0.69 (0.46–0.97)	0.74 (0.54–1.01)	0.74 (0.52–1.04)
High > 2	1.09 (0.72–1.66)	1.08 (0.68–1.71)	0.88 (0.60–1.29)	0.89 (0.60–1.33)	0.78 (0.53–1.14)	0.82 (0.55–1.23)
Psychiatric disease
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	0.65 (0.37–1.15)	0.75 (0.42–1.36)	0.47 (0.26–0.85)	0.55 (0.30–1.01)	0.44 (0.24–0.82)	0.50 (0.27–0.93)

Numbers in round brackets are 95% confidence intervals (CIs). The estimated RRs and 95% CIs were obtained after multiple imputations in a generalised linear regression using the pseudo-value approach

^aMutual adjusted for age, gender, cohabitation status, education, and co-morbidity