Reasons for acute referrals to hospital from general practitioners and out-of-hours doctors in Norway: a registry-based observational study

Table 6 Discharge diagnoses for patients referred to acute hospital admission with the diagnosis pneumonia (R81). Relative risk for different discharge ICD-10 diagnoses by explanatory variables (referrals, age and gender), compared with discharged with pneumonia (J12–18)

Discharge ICD-10 diagnoses	All		OOH referrals			Age			Gender (F)
Discharge ICD-10 diagnoses	N	%	%^a	RR^c	95% CI	Median (IQR)	RR^c	95% CI	%^b	RR^c	95% CI
Pneumonia (J12–18)	5173	59	52			72 (57–83)			51
COPD (J44)	488	6	56	1.09	0.92–1.29	75 (69–82)	1.21	1.15–1.27	52	1.06	0.90–1.26
Influenza (J10)	328	4	59	1.27	1.02–1.57	76 (65–85)	1.14	1.08–1.21	51	1.01	0.82–1.24
Other diagnoses chapter J (respiratory)	1041	12	51	0.98	0.88–1.10	69 (44–80)	0.90	0.88–0.91	49	0.93	0.84–1.04
Diagnoses chapter I (circulatory)	420	5	49	0.84	0.70–1.01	81 (71–88)	1.32	1.24–1.41	50	0.96	0.80–1.15
Diagnoses chapter N (genitourinary)	285	3	57	1.14	0.91–1.44	81 (71–86)	1.26	1.18–1.35	47	0.86	0.69–1.08
Other	1058	12	50	0.91	0.82–1.02	73 (64–83)	1.07	1.04–1.10	45	0.82	0.73–0.91
All	8793	100	52			73 (60–83)			50

Legend: Distribution of discharge diagnoses for patients referred to acute hospital admission by general practitioner (GP) and out-of-hours (OOH) doctor with the ICPC-2 referral code pneumonia (R81) in Norway 2017
IQR Interquartile range
^aPercent of OOH doctor in referrals with pneumonia (R81) diagnosis and the current ICD-10 discharge diagnosis
^bPercent of women in referrals with pneumonia (R81) diagnosis and the current ICD-10 discharge diagnosis
^cRelative risk for the different ICD-10 discharge diagnoses for OOH referrals relative to GP referrals, for a 10-years increase in age, and for female patients relative to male patients compared with discharge with pneumonia (J12–18)

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