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Table 3 Summaryof methodological qualities of studies

From: Effectiveness of Back care education Programme among school children: a systematic review of randomized controlled trials

METHODOLOGICAL QUALITY

NO OF STUDIES

PERCENTAGES

PEDRO SCALE

  

 Eligibility criteria

4

50%

 Radom allocation

8

100%

 Concealed allocation

3

37.5%

 Groups similar at baseline

8

100%

 Subject blinding

3

37.5%

 Therapist blinding

1

12.5%

 Assessor blinding

2

25%

 Less than 15% dropouts

8

100%

 Intention to treat analysis

6

75%

 Between groups statistical comparisons

8

100%

 Point measure and variability data

4

50%

PEDRO TOTAL SCORE

  

 Excellent quality (9, 10)

0

0%

 Good quality (6–8)

6

75%

 Fair quality (4, 5)

2

25%

 Poor quality(0–4)

0

0%

SAMPLE SIZE

  

 ≤100

1

12.5

 ≥100

7

87.5%

LEVEL OF EVIDENCE

  

 Level 1

5

62.5%

 Level 2

3

37.5%