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Table 2 Quality criteria of articles selected for a systematic critical literature review on the effect of SMT on pain

From: The effect of spinal manipulative therapy on experimentally induced pain: a systematic literature review

Article Is the assessment blinded? Is there a control on psychological characteristics of subjects? The validity of the outcome variable: When was it measured? Is the random procedure mentioned? Number of experiments (pain + SMT) Study subjects: SMT performed by: Is the SMT well described? Are losses and exclusions reported? Experimental conditions Estimates given Are differences tested for statistical significance? Total of points
  Yes = 2 pts No = 0 point Points Yes = 1 point No = 0 point Points Pilot study = 1 pts or ,Ref are given = 1 pt or, it's reproducible = 1 pt Nothing = 0 pt Points (max 1 pt) before and after = 1 point only after = 0 point Points Yes = 2 pts No = 0 point Points > 1 = 1 point 1 = 0 point Points Naive to tx and blind (sham manip) = 2 pts Naive or blind = 1 point Not naive and not blind = 0 pt Points Same person = 1 point Experienced person (> 5 years) = 1 point Points (max 2 pts) Yes = 1 point No = 0 point Points Yes = 2 pts No = 0 point Points same day or T° controlled or same time = 1 point different day and T° or time not controlled = 0 point Points Yes = 1 point No = 0 point Points Yes = 1 point No = 0 point Points Min = 0 Max = 18
[39] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Blind 1 Same and experienced 2 Yes 1 Yes 2 Same day 1 Yes 1 Yes 1 16
[21] Yes 2 No 0 Reproducible 1 Before and after 1 Yes 2 3 1 Naive and blind 2 Same and experienced 2 Yes 1 No 0 Same day 1 Yes 1 Yes 1 15
[31] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Blind 1 Experienced 1 Yes 1 Yes 2 T controlled 1 Yes 1 Yes 1 15
[42] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Blind 1 Same and experienced 2 Yes 1 No 0 Same day 1 Yes 1 Yes 1 14
[29] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Naive 1 Same and experienced 2 Yes 1 No 0 Same day 1 Yes 1 Yes 1 14
[44] No 0 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Naive and blind 2 Same and experienced 2 Yes 1 Yes 2 More 48 H, no control T° 0 Yes 1 Yes 1 14
[38] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Blind 1 Same and experienced 2 Yes 1 No 0 Same day 1 Yes 1 Yes 1 14
[34] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Naive 1 Same and experienced 2 Yes 1 No 0 Same day? 1 Yes 1 Yes 1 14
[35] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Naive 1 Same and experienced 2 Yes 1 No 0 Same day? 1 Yes 1 Yes 1 14
[37] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Nothing 0 Same and experienced 2 Yes 1 No 0 Same day 1 Yes 1 Yes 1 13
[28] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Naive and blind 2 Experienced 1 Yes 1 No 0 More 48 H, no control T° 0 Yes 1 Yes 1 13
[43] No 0 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Naive and blind 2 Same 1 Yes 1 Yes 2 More 3 days, no control T° 0 Yes 1 Yes 1 13
[20] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 3 1 Blind 1 Experienced 1 Yes 1 No 0 Same day 1 Yes 1 Yes 1 13
[40] Yes 2 No 0 Reproducible 1 Before and after 1 Yes 2 2 1 Naive and blind 2 Experienced 1 Yes 1 No 0 More 7 days, no control T° 0 Yes 1 Yes 1 13
[18] No 0 Yes 1 Ref given 1 Before and after 1 Yes 2 2 1 Nothing 0 Nothing 0 Yes 1 Yes 2 Same day 1 Yes 1 Yes 1 12
[19] Yes 2 No 0 Ref given 1 Before and after 1 No 0 3 1 Blind 1 Same and experienced 2 Yes 1 No 0 More 48 H, no control T° 0 Yes 1 Yes 1 11
[32] Yes 2 No 0 Ref given 1 Before and after 1 No 0 3 1 Naive and blind 2 Nothing 0 Yes 1 No 0 More 3 days, control T° 1 Yes 1 Yes 1 11
[30] Yes 2 No 0 Ref given 1 Before and after 1 No 0 3 1 Blind to sham laser 1 Nothing 0 Yes 1 No 0 Same day 1 Yes 1 Yes 1 10
[36] No 0 Yes 1 Ref given 1 Before and after 1 Yes 2 10 1 Nothing 0 Nothing 0 Yes 1 No 0 Same day 1 Yes 1 Yes 1 10
[41] Yes 2 No 0 Ref given 1 Before and after 1 Yes 2 1 0 Nothing 0 Nothing 0 Yes 1 No 0 Same day 1 Yes 1 Yes 1 10
[33] Yes 2 No 0 Ref given 1 Before and after 1 No 0 3 1 Naive and blind 2 Nothing 0 No 0 No 0 More 3 days, no control T° 0 Yes 1 Yes 1 9
[23] No 0 Yes 1 Ref given 1 Before and after 1 No 0 2 1 Nothing 0 Nothing 0 yes 1 No 0 Highly controlled 1 Yes 1 Yes 1 8
  1. T° = temperature.