Table 7. Importance and Threshold Scores Identified for PROs.

	N1	Important	Not Important	Unfamiliar	N2	Operative	Non- operative
PRO	Operative Non-operative				Operative Non-operative	Median [1Q, 3Q]	Median [1Q, 3Q]
GRS	1374 1261	45%	32%	17%	123 107	90 [90, 90]	90 [85, 90]
KOS-SAS	1386 1267	42%	35%	18%	87 75	90 [80, 90]	90 [80, 90]
KOS- ADLS	1382 1266	41%	36%	17%	95 84	90 [80, 90]	90 [80, 90]
IKDC2000	1377 1262	38%	33%	24%	87 70	90 [85, 90]	90 [85, 90]
KOOS	1379 1263	37%	38%	18%	56 48	85 [80, 90]	85 [80, 90]
Lysholm	1382 1269	36%	36%	22%	94 76	90 [85, 90]	85 [82.5, 90]
Cincinnati	1363 1253	29%	42%	22%	33 25	90 [80, 90]	90 [80, 90]
Tegner	1379 1268	29%	38%	28%	38 32	7 [6, 8]	7 [5,8]
Marx	1354 1247	13%	42%	40%	10 7	12 [8.5, 12]	12 [10, 12]

Abbreviations: PRO – patient reported outcome; N1 – the number of respondents concerning the importance of each PRO (maximum 1490 operative, 1326 non-operative) ; N2 – the number of respondents who provided a valid threshold score for defining success on each measure; 1Q – the first quartile representing the 25^th percentile; 3Q – the third quartile representing the 25^th percentile; GRS – global rating scale; KOS-SAS – Knee Outcome Score – Sports Activities Scale; KOS-ADLS - Knee Outcome Score – Activities of Daily Living Scale; IKDC2000 – International Knee Documentation Committee 2000 Subjective Knee Form; Lysholm – Lysholm Knee Score; Cincinnati – Cincinnati Knee Score; Tegner – Tegner Activity Scale; Marx – Marx Activity Rating Scale