Table 3.

Presence of chronic physical and mental conditions per identification method

	Total cohort n (%)	Method A n (%)	Method B n (%)	Method C n (%)	Method D n (%)	All methods combined n (%)
Chronic physical condition	101 868 (60.2)	5624 (66.9)	9446 (79.4)	3957 (70.0)	280 (58.1)	15 313 (73.4)
Chronic mental condition	30 750 (18.2)	2838 (33.8)	4188 (35.2)	2020 (36.2)	289 (60.0)	7080 (33.9)

The table was created by the author and permission for reuse is granted to BMJ Open

Method A: patients with recorded FM, IBS, and/or CFS based on ICPC-codes.

Method B: patients with at least six ICPC codes that correspond to the Robbins list in any 6 month period.

Method C: patients with reported PSS-related terminology.

Method D: patients with ≥20 points on the somatisation subscale of the 4DSQ.

CFS, chronic fatigue syndrome; 4DSQ, Four-Dimensional Symptom Questionnaire; FM, fibromyalgia; IBS, irritable bowel syndrome; ICPC, International Classification of Primary Care; PSS, persistent somatic symptoms.