Psychometric properties of patient-reported outcome measures (PROMs) in wrist osteoarthritis: test–retest reliability and construct validity

Table 2 Test–retest reliability of the NRS, DASH and PRWE in 50 patients with wrist osteoarthritis (OA)

PROMs	T1, median (IQR)	T2, median (IQR)	Kappa coefficient (CI 95%)
NRS
Pain at rest	3 (1–5)	3 (1–6)	0.83 (0.73–0.92)
Pain on motion without load	6 (3–8)	6 (3–8)	0.91 (0.86–0.95)
Pain on load	8 (5–9)	7 (5–9)	0.92 (0.87–0.96)
DASH	37.1 (21.5–55.4)	38.4 (22.9–54.6)	0.91 (0.84–0.98)
PRWE
Subscale Pain	30.5 (22.5–38.0)	31.5 (23.0–38.3)	0.93 (0.90–0.97)
Subscale Function	26.8 (13.4–34.7)	24.5 (14.7–36.0)	0.93 (0.88–0.98)
Total score	56.0 (31.5–69.5)	53.5 (35.4–75.4)	0.94 (0.91–0.98)

T1 Test occasion 1, T2 Test occasion 2, IQR Interquartile range, CI Confidence interval, NRS Numeric Rating Scale (score range 0–10), DASH Disabilities of the Arm, Shoulder and Hand (score range 0–100), PRWE Patient-Rated Wrist Evaluation (subscale pain score range 0–50, subscale function score range 0–50, total score range 0–100)