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Table 1 Descriptive checklist of the reported ‘effect sizes’ in eight randomized sham-controlled studies included in a previous systematic review on pressure pain threshold changes after spinal manipulation

From: How big is the effect of spinal manipulation on the pressure pain threshold and for how long does it last? – secondary analysis of data from a systematic review

First author

Year

Quality score as reported in previous review (Honoré and al, 2018)

- Area of spinal manipulation

- Regional testing site/s

Number of follow-ups and time of follow-ups

-Is there a reported effect size? (Yes/No)

- Which type of “effect size” was reported (between or within-group comparison)?

Ruiz Saez 2007

8/9

- Cervical

- Upper trapezius

3 follow-ups:

1) Immediately after

2) 5 min after

3) 10 min after

-Yes

-Within-group comparison

Srbely2013

7.5/9

-Cervical (bilateral)

- Infraspinatus muscle

4 follow-ups:

1) 1 min after

2) 5 min after

3)10 min after

4) 15 min after

-No

- NA

Fernandez de la Penas 2008

7/9

- Cervical

- C5-C6 level

1 follow-up:

1) 5 min after

-Yes

- Within-group comparison

Fernandez de la Penas 2007

7/9

- Cervical

- Ipsilateral and contralateral epicondyle

1 follow up:

1) 5 min after

- Yes

- Within-group comparison

Hamilton 2007

7/9

- Cervical

- Between C0 and C2

2 follow-ups:

1) 5 min after

2) 30 min after

- Yes

- Within-group comparison

Yu 2012

8/9

- Lumbar

- L5-S1 over apophyseal joints

- L5 dermatome

1 follow-up:

1) Immediately after

- No

- NA

Thomson 2009

6/9

- Lumbar

-Spinous process of L3

1 follow-up:

1) Immediately after

- Yes

-Within-group comparison

Fryer 2004

5/9

-Thoracic

-Thoracic spinous process between T1 and T4

1 follow-up:

1) Immediately after

- Yes

- Within-group comparison

  1. NA: not applicable;