To what extent are psychiatrists aware of the comorbid somatic illnesses of their patients with serious mental illnesses? – a cross-sectional secondary data analysis

Table 1 Predefined criteria for selected somatic diseases using ICD-10 and ATC codes for prescribed medications^a

Disease	ICD-10 code in health insurance data	ATC code prescription documented in health insurance data
Diabetes	E10-E14, G6320	A10 (at least one time)
Hypertension	I10-I15	C02 (at least twice within 90 days) OR at least two different ATC codes [C02, C03, C07, C08 or C09] (within 90 days)
CAD	I20-I25	No distinct diagnosis by means of ATC codes
Hyperlipidaemia	E780-E785	C10 (at least one time)
Glaucoma	H40, H42	S01E (at least twice within 90 days) AND manual review by a physician to identify patterns and decide individually
Osteoporosis	M80-M82	At least two ATC codes [G03XC01, H05, M05BA or M05BB] (within 90 days)
Polyarthritis	M05-M09	At least three ATC codes [M01B, M01CA, M01CB, M01CX, M02, L04AA13, L04AB01, L04AB04 or L04AX03] (within 180 days) AND manual review by a physician to identify patterns and decide individually
COPD	J44, J4200, J4390	At least three ATC codes [R03, R05] (within 180 days)

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