Table 1.

Health status subdomains and their definition and included instruments of the Nijmegen Clinical Screening Instrument (NCSI)

Domain	Subdomain	Definition	Instruments/measurement	No. of items
Physiological functioning	Airflow		Post-bronchodilator FEV1% of predicted
	Body composition		Body mass index
	Exercise capacity		VO2 max% of predicted
Symptoms	Subjective symptoms	The patient’s overall burden of pulmonary symptoms	PARS-D Global Dyspnoea Activity [11]	1
			PARS-D Global Dyspnoea Burden [11]	1
	Dyspnoea emotions	The level of frustration and anxiety a person experiences when dyspnoeic	DEQ frustration [11]	3
			DEQ anxiety [11]
	Fatigue	The level of experienced fatigue	CIS subjective fatigue [20]	8
Functional impairment	Subjective impairment	The experienced degree of impairment in general	QoLRiQ general activities [21]	4
	Behavioural impairment	The extent to which a person cannot perform specific and concrete activities as a result of having the disease	SIP home management [22]	10
			SIP ambulation [22]	12
Quality of life	General quality of life	Mood and the satisfaction of a person with his/her life as a whole	BDI primary care [23]	7
			Satisfaction with life scale [24]	5
	Health-related quality of life	Satisfaction related to physical functioning and the future	Satisfaction physiological functioning [11]	1
			Satisfaction future [11]	1
	Satisfaction relations	Satisfaction with the (absent) relationships with spouse and others	Satisfaction spouse [11]	1
			Satisfaction social [11]	1

No. number, FEV ₁ forced expiratory volume in 1 s, VO ₂ max maximal oxygen uptake, PARS-D Physical Activity Rating Scale-Dyspnoea, DEQ Dyspnoea Emotions Questionnaire, CIS Checklist Individual Strength, QoL-RiQ Quality of Life for Respiratory Illness Questionnaire, SIP Sickness Impact Profile, BDI Beck’s Depression Inventory