Radiological features accompanying peroneus brevis split rupture revealed on magnetic resonance imaging – a cohort study

Table 4 Agreement between observers and differences between groups in evaluation of bone and joint fluid. Two-sided Fisher’s exact test was used to evaluated differences. The Bonferroni-Holm method was used to adjust for multiple comparisons if Fisher test was p < 0.05

	p	Experimental group (Cohen’s κ)			n	Control group (Cohen’s κ)			n
Feature –		Observer 1 vs. 4	Observer 1 vs. 3	Observer 3 vs. 4		Observer 1 vs. 4	Observer 1 vs. 3	Observer 3 vs. 4
Anterior part of lateral malleolus	FT p > 0.05	0.42	0.65	0.53	6	0.35	0.82	0.46	4
Posterior part of lateral malleolus	FT p < 0.001; B-H p < 0.001	0.50	0.72	0.45	19	0.22	0.81	0.49	3
Lateral part of the talar body	FT p < 0.05; B-H p = 0.264	0.56	0.78	0.67	19	0.26	0.81	0.39	12
Medial part of talar body	FT p > 0.05	0.43	0.61	0.60	11	0.47	0.73	0.61	22
Superior part of the talar body	FT p > 0.05	0.45	0.58	0.51	18	0.47	0.67	0.57	20
Inferior part of the talar body	FT p > 0.05	0.65	0.70	0.72	18	0.48	0.64	0.55	18
Lateral part of the distal tibia	FT p > 0.05	0.39	0.81	0.74	10	0.41	0.61	0.53	5
Medial part of the distal tibia (without medial malleolus)	FT p > 0.05	0.32	0.82	0.60	8	0.32	0.73	0.49	8
Medial malleolus	FT p > 0.05	0.66	0.79	0.68	13	0.42	0.70	0.54	11
Lateral part of the calcaneus	FT p > 0.05	0.39	0.58	0.65	9	0.25	0.67	0.55	6
Medial part of calcaneus	FT p > 0.05	0.42	0.51	0.60	6	0.36	0.68	0.45	7
Normal amount of joint fluid	FT p < 0.001; B-H p = 0.099	0.52	0.82	0.59	37	0.36	0.78	0.49	77
Moderate effusion	Fisher test p < 0.05; B-H p = 0.186	0.41	0.81	0.59	33	0.46	0.76	0.68	26
Severe effusion	FT p > 0.05	0.49	0.91	0.64	10	0.54	0.77	0.70	12
Concave groove	FT p < 0.05, B-H p = 0.132	0.39	0.65	0.59	34	0.44	0.56	0.49	26
Flat groove	FT > 0.05	0.19	0.56	0.49	24	0.25	0.47	0.39	42
Convex groove	FT p > 0.05	0.32	0.55	0.43	23	0.35	0.59	0.40	47
Os peroneum	FT > 0.05	0.41	0.78	0.63	11	0.35	0.68	0.51	8
Prominent peroneal tubercle	FT > 0.05	0.37	0.80	0.54	2	0.45	0.62	0.54	5

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