Table 3.

Intraobserver and interobserver results of the static, web-based, exercise on the midfoot joints (strength of agreement: <0.20 poor, 0.21–0.40 fair, 0.41–0.60 moderate, 0.61–0.80 good, 0.81–1.00 excellent)

Intraobserver agreement of the static exercise_midfoot					Interobserver agreement of the static exercise_midfoot
	Prevalence mean range (%)	Observed agreement mean, range (%)	Kappa mean range	PABAK mean range	Prevalence mean I round (%)	Prevalence mean II round (%)	Observed agreement mean, I round (%)	Observed agreement, mean, II round (%)	Kappa mean I round	Kappa mean II round	PABAK mean I round	PABAK mean II round
Synovial hypertrophy (0–1)	54 (29–75)	85 (75–100)	0.70 (0–0.9)	0.71 (0–0.87)	55	54	76	86	0.52	0.72	0.52	0.72
Joint effusion (0–1)	53 (44–66)	82 (29–100)	0.65 (−0.42 to 1)	0.65 (−0.42 to 1)	57	50	79	85	0.58	0.70	0.58	0.70
Synovial hypertrophy score (0–3)	30 (13–41) grade 1; 20 (13–31) grade 2; 17 (7–25) grade 3	65 (14–94)	0.54 (−0.06 to 0.91)	0.54 (−0.14 to 0.91)	23 (grade1) 29 (grade 2) 19 (grade 3)	37 (grade 1) 12 (grade 2) 15 (grade 3)	63	78	0.51	0.68	0.51	0.70
Power Doppler score (0–3)	51 (50–67) grade 1; 30 (25–38) grade 2; 18 (0–25) grade 3	91 (75–100)	0.85 (0.6–1)	0.88 (0.66–1)	50 (grade 1) 31 (grade 2) 19 (grade 3)	51 (grade 1) 30 (grade 2) 17 (grade 3)	90	89	0.84	0.83	0.86	0.85
Osteophytes score (0–3)	38 (28–44) grade 1; 29 (16–44) grade 2; 17 (6–34) grade 3	71 (31–94)	0.60 (0.12–0.91)	0.61 (0.08–0.91)	38 (grade 1) 26 (grade 2) 16 (grade 3)	37 (grade 1) 32 (grade 2) 18 (grade 3)	60	69	0.46	0.59	0.47	0.59

PABAK, prevalence-adjusted bias-adjusted kappa.