Reliability of the PEDro scale: comparison between trials published in predatory and non-predatory journals

Table 3 Inter-rater reliability indexes (PEDro scale items: Cohen’s kappa; PEDro score: Intraclass Correlation Coefficient, ICC) found in the present study and in the published literature

	Present study^a			Maher, 2003^a	Maher, 2003^b	Shiwa, 2011^b	Tooth, 2005^a
	PJs	NPJs	All	Maher, 2003^a	Maher, 2003^b	Shiwa, 2011^b	Tooth, 2005^a
Item 2	.14	NA	.01	.13		.91	NA
Item 3	.73	.68	.71	.62		.73	.87
Item 4	.19	.62	.36	.40		.60	.53
Item 5	.57	.68	.65	.66		1.00	NA
Item 6	.56	.59	.59	.33		1.00	NA
Item 7	.60	.70	.65	.73		.78	.86
Item 8	.24	.42	.30	.42		.53	.56
Item 9	.14	.21	.15	.12		.66	.88
Item 10	.48	.09	.39	.62		.66	NA
Item 11	.66	.40	.55	.59		.74	.55
ICC (95% CI)	.54 (.43-.63)	.73 (.63-.80)	.64 (.57 -.70)	.55 (.41-.72)	.68 (.57- .76)	.82 (.70-.89)	.71 (.59-.83)

ISSN: 2057-0082