Effect of free-weight vs. machine-based strength training on maximal strength, hypertrophy and jump performance – a systematic review and meta-analysis

Table 1 Assessment of inter-rater reliability and agreement between raters’ blinded judgement of included studies (n = 13) using the Testex screening tool

		Measurements of agreement
		Kappa	SE	P-value	Percentage
1	Eligibility criteria included	0.70^d	0.18	0.005	86
2	Randomization method stated	1.00^e	0.00	< 0.001	100
3	Allocation concealment	1.00^e	0.00	< 0.001	100
4	Groups similar at baseline	NA	-	-	92
5	Assessor blinded	Constant	-	-	100
6a	Study withdrawals < 15%	1.00^e	0.00	< 0.001	100
6b	Adverse events reported	1.00^e	0.00	< 0.001	100
6c	Session attendance reported	0.63^d	0.33	0.011	92
7	Intention-to-treat analysis	Constant	-	-	100
8a	Between-group primary analysis	Constant	-	-	100
8b	Between-group secondary analysis	Constant	-	-	100
9	Point measures for all outcomes	Constant	-	-	100
10	Activity monitoring controls	Constant	-	-	100
11	Relative exercise intensity adjusted	Constant	-	-	100
12	Exercise energy expenditure information reported	Constant	-	-	100
Total scores of intra-rater agreement		0.78^d	0.14	< 0.001	85

Abbreviations Testex Tool for the assEssment of Study qualiTy and reporting in Exercise, SEStandard Error, NA Not applicable due to constant values preventing Kappa analysis, Constant 100% agreement on rating, preventing Kappa analysis. Subscript letters denote level of agreement with Kappa analysis: a = < 0.20: poor, b = [0.20, 0.40): fair, c = [0.40, 0.60): moderate, d = [0.60, 0.80): good, and e = [0.80, 1.00]: very good [33]

ISSN: 2052-1847