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Table 2 Quality check-list of articles reviewed

From: The effect of spinal manipulative therapy on spinal range of motion: a systematic literature review

Author and references Random allocation Study subjects naïve*/disinterested Was there a credible sham treatment? Was SMT well described? Was SMT performed by experienced person? Was the ROM assessor blinded? Were pre/post treatment ROM-test performed by the same person? Was ROM assessed by a valid method or own inter/intra validation? Were losses reported? Were results reported and estimates shown in tables/graphs? Were results tested for statistical significance? Physical conditions controlled for all treatment groups If study samples contained people older than 45, was the age distribution shown in treatment groups to be similar? Total score Score /100
Oliveira Campello[35] Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 ? 0 N/A - 11 /12 92
Kanlayanaphotporn[43] Yes 1 No 0 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 ? 0 No, but compared base line variable for both - 10 /12 83
Konstantinou[46] Yes 1 Yes 1 No 0 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 ? 0 Upper level age is known, but N/A because cross-over - 10 /12 83
Whittingham[40] Yes 1 Yes 1 Yes 1 Yes 1 ? 0 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 ? 0 Age range are known, but N/A because cross-over - 10 /12 83
Stamospapastomous[47] Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 No 0 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 ? 0 N/A - 10 /12 83
Krauss[42] Yes 1 Yes 1 No 0 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 ? 0 No (19 – 50) 0 10 /13 77
Martinez Segura[37] Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 No 0 Yes 1 Yes 1 ? 0 No (20 – 55) 0 10 /13 77
Goodsell[45] Yes 1 Yes 1 No 0 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 No 0 Yes 1 Yes 1 ? 0 Yes 1 9 /13 69
Mc Clatchie[38] Yes 1 Yes 1 Yes 1 Yes 1 ? 0 Yes 1 Yes 1 Yes 1 No 0 Yes 1 Yes 1 ? 0 No (>16) 0 9 /13 69
Mansilla-Ferragut[34] Yes 1 ? 0 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 No 0 Yes 1 Yes 1 ? 0 No (21–50) 0 9 /13 69
Cassidy[36] Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 Yes 1 ? 0 Yes 1 No 0 Yes 1 Yes 1 ? 0 Age not known 0 9 /13 69
Tuttle[41] Yes 1 ? 0 Yes 1 No 0 Yes 1 Yes 1 Yes 1 Yes 1 No 0 Yes 1 Yes 1 ? 0 Age range known, but N/A because cross-over - 8 /12 67
Kanlayanaphotporn[44] Yes 1 No 0 Yes 1 Yes 1 Yes 1 Yes 1 No 0 Yes 1 No 0 Yes 1 Yes 1 ? 0 No, but compared base line variable for both - 8 /12 67
Passmore[39] Yes 1 No 0 No 0 Yes 1 Yes 1 Yes 1 ? 0 ? 0 No 0 Yes 1 Yes 1 ? 0 N/A - 6 /12 50
Pollard[48] Yes 1 No 0 No 0 Yes 1 ? 0 ? 0 ? 0 ? 0 No 0 Yes 1 Yes 1 ? 0 N/A - 4 /12 33