Table 5

Interpretability including missing items, response rate and floor and ceiling effects

Instrument and study	Administration	Missing responses (%)	Missing items (%)	Overall % lowest possible total score (floor)	Overall % highest possible score (ceiling)	Items or Domains with >15% responses with lowest score (floor)	Items or domains >15% highest possible score (ceiling)	MIC
Symptoms and functional status
Hughston
Goodwin et al 29	Clinic	Not reported	Not reported	0	0	Not reported	Not reported	Not reported
IKDC
Crawford et al 31	Clinic/postal	Not reported	Not reported	0	0	Activity pain Pain last 4 weeks Pain severity Catching Kneeling Sitting Running Jumping Stopping	Swelling Catching Climb stairs Sitting Rising	Not reported
van de Graaf et al 32	Online/postal	Unclear	0	0	0	Nil	Nil	Not reported
KOOS
Roos et al 34	Postal	7.2	0.8	Not reported	Not reported	Nil	Nil	Not reported
van de Graaf et al 32	Online/postal	Unclear	0	0	3	Nil	Nil	Not reported
Lysholm
Briggs et al 21	Clinic	Not reported	Not reported	0%	0.5%	Squatting Pain	Swelling Instability Support Limp Locking	Not reported
WOMAC
van de Graaf et al 32	Online/Postal	Unclear	0	0	6	Nil	Nil	Not reported
Health-related quality of life
EQ-5D
Goodwin et al 29	Clinic	Not reported	Not reported	4	1	Not reported	Not reported	Not reported
KQoL-26	h31
Garratt et al 39	Postal	41	14.9	Not reported	Not reported	Avoiding turning, twisting, or sideways movements *	Staying seated for 15 min *	Not reported
SF-6D
Goodwin et al 29	Clinic	Not reported	Not reported	0	0	Not reported	Not reported	Not reported
WOMET
Kirkley et al 41	Clinic	Not reported	Not reported	5.7	1.7	Not reported	Not reported	Not reported
Sihvonen et al 59	Unclear	16	7.5	0	0	Numbness	Nil	Not reported
Celik et al 60	Unclear	Not reported	Not reported	0	0	Numbness Swelling	Consciousness Activities Specific skills Squatting Fear injury Concern about future of knee Frustration	Not reported
Tong et al 61	Unclear	Not reported	0	0	0	Nil	Nil	Not reported
van der Wal et al 51	Clinic	0	<1	0	0	Numbness Swelling	Nil	14.7
Activity level
Tegner
Briggs et al 21	Clinic	Not reported	Not reported	2.5	2.5	na	na	Not reported

*Other domains not reported.
EQ-5D, EuroQoL-5 dimension; IKDC, International Knee Documentation Committee; KOOS, Knee injury and Osteoarthritis Outcome Score; KQoL-26, 26-item Knee Quality of Life; MIC, minimal important change; SF-6D, Short Form-6 dimensions; WOMAC, Western Ontario McMaster Osteoarthritis Index; WOMET, Western Ontario Meniscal Evaluation Tool.