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. 2020 Jan 15;15(1):e0227423. doi: 10.1371/journal.pone.0227423

Table 2. Study characteristics (left columns) and individual studies’ results (right columns).

For each of the studies included, methodological aspects, participants’ characteristics, and key results are displayed. RCT, randomized controlled trial, CT, controlled trial; MCE, motor control stabilisation exercise, Ctrl, control or comparison group; CLBP, chronic low back pain; N, number; f, female; m, male; SD, standard deviation; Mx, measurement visit number, VAS, visual analogue scale; NRS, numeric rating scale; ODI, Owestry disability index, RMDQ, Roland Morris disability questionnaire.

First Author, year Citation Design, Arms Main inclusion criterion lbp N (Total, MCE, C, C2, …) Age (Mean± SD) Sex (f/m) Baseline-pain (Scale, MW, SD if not stated otherwise) Measurement time points total (N: weeks (if not, stated otherwise) after Baseline) Primary outcome pain, name, Cohens d, (M0-M1, M0-M2, …) Primary outcome disability name, Cohens d, (M0-M1, M0-M2, …)
Bae, 2018 [20] RCT, 2
MCE
Ctrl
CLBP ≥ 12 weeks 36
18
18
years
32.7±6.1
32.4±11
18/20 VAS (0–10)
2.9±0.8
3.0±1.3
4:
4
8
16
VAS (0–10)1
1.25
1.75
ODI
.19
.17
.24
Critchley, 2007 [21] RCT, 3
MCE
Ctrl 1
Ctrl 2
CLBP ≥ 12weeks 212
72
71
69
years
44±13
45±12
44±12
133/89 NRS (0–100), mean, 95%CI
67, 61–73
60, 54–66
59, 52–65
4:
6 months
12 months
18 months
NRS (0–10)
.7
.6
.9
RMDQ
1.0
.7
.8
Ferreira 2007 [22] RCT, 3
MCE
Ctrl 1
Ctrl 2
CLBP ≥ 12 weeks 240
80
80
80
years
51.9±15.3
54.8±15.3
54.0±14.4
165/75 VAS (0–10)
6.3±2.0
6.5±2.1
6.2±2.0
4:
8
24
48
VAS (0–10)
.9
1
.7
RMDQ
1.2
1.1
.98
Giesche 2017 [23] CT, 2
MCE
Ctrl
CLBP ≥24 weeks 48
25
23
years
56.5±11.3
60.1±12.2
31/17 NRS (0–10)
4.6±2.0
4.9±2.0
4:
2
3
8
NRS (0–10)
.1
.55
.65
ODI
.3
.34
Kofotolis, 2016 [27] RCT, 3
MCE
Ctrl 1
Ctrl 2
CLBP ≥12 weeks 101
37
36
28
years
41.2±8.5
42.7±6.1
39.1±8.7
101/0 SF-36 pain
38.51±12.62
36.93±15.5
39.4±14.5
5:
4
8
12
20
SF-36 pain (0–100)
1.9
3,2
2,9
RMDQ
.75
1.2
1.1
Macedo, 2012 [27] RCT, 2
MCE
Ctrl
CLBP
≥ 12 weeks
158
76
82
years
48.7±13.7
49.6±16.3
102/56 NRS (0–10)
6.1±2.1
6.1±1.9
4:
8
6 months
12 months
NRS (0–10)
.95
.95
1.1
RMDQ
.8
.7
.8
Marshall, 2013 [24] RCT,2
MCE
Ctrl
Recurrent LBP ≥ 12 weeks 64
32
32
years
36.2 ± 8.2
36.2 ± 6.2
40/24 VAS (0–10)
3.6 ± 2.1
4.5 ± 2.5
3:
8
6 months
VAS (0–10)
.9
.76
ODI
.93
.93
Rasmussen-Barr, 2003 [25] RCT, 2
MCE
Ctrl
LBP sub-acute, chronic or
recurrent ≥ 6 weeks
42
22
20
years
39± 12
37± 10
12, 35 VAS (0–100), median 25th /75th
33 (27/49)
32 (21/49)
4:
6
3 months
12 months
VAS (0–100)
1.6
1.3
ODI
1.9
1.8
Rasmussen-Barr, Eva, 2009 [26] RCT, 2
MCE
Ctrl
LBP ≥ 8 weeks 71
36
35
years
37± 10
40± 12
35, 36 VAS (0–100), VAS (0–100), median 25th /75th
32 (18/75)
38 (23/62)
5:
8
6 months
12 months
36 months
VAS (0–100),
.8
.9
OSD
.9
1.4
Unsgaard-Tondel, 2010 [19] CT, 3
MCE
Ctrl 1
Ctrl 2
CLPB 109
36
36
37
years
41± 12
43± 10
36± 10
33, 76 NRS (0–10)
3.3 ± 1.3
3.6 ± 1.7
3.3 ± 1.9
3:
8
1 year
NRS (0–10)
.37
.27
ODI
.9
N.A.