Table 3.

Floor and ceiling effects in PROMIS and legacy instruments

Author	N	Procedure	PROMIS domain	Timepoint	Floor (%)	Ceiling (%)
Khalil et al. [19]	875	TKA	PROMIS GPH	NR	0	0
Austin et al. [21]	217	TKA	PROMIS GPH	Preoperative	< 0.1	0
			PROMIS GPH	(1–90 days)	0	< 0.1
			PROMIS GPH	(270–365 days)	0	1.60
			PROMIS GMH	Preoperative	< 0.1	5.60
			PROMIS GMH	(1–90 days)	< 0.1	6.20
			PROMIS GMH	(270–265 days)	0	7.20
			KOOS-JR	Preoperative	1	0.20
			KOOS-JR	(1–90 days)	< 0.1	0.90
			KOOS-JR	(270–265 days)	1	4.80
			M-SANE	Preoperative	4	1.00
			M-SANE	(1–90 days)	0	0.90
			M-SANE	(270–265 days)	0	11.30
Lawrie et al. [31]	172	TKA, BPCI	PROMIS PF	Preoperative	0	0
			PROMIS PF	12 months	0	0
			PROMIS PI	Preoperative	0	0
			PROMIS PI	12 months	20	0
			Depression	Preoperative	13	0
			Depression	12 months	38	0
		TKA, non-BPCI	PROMIS PF	Preoperative	0	0
			PROMIS PF	12 months	0	0.50
			PROMIS PI	Preoperative	0	0
			PROMIS PI	12 months	14	0
			Depression	Preoperative	21	0
			Depression	12 months	38	0