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Table 1 Number of participants within the 14 different strata's divided into the two groups.

From: Implementation of neck/shoulder exercises for pain relief among industrial workers: A randomized controlled trial

 

TRAINING GROUP

CONTROL GROUP

Stratum

Participants (N)

Clusters (N)

Cluster size (range)

Participants (N)

Clusters (N)

Cluster size (range)

A

44

7

3-12

58

8

1-15

B

24

3

1-12

27

3

8-11

C

12

3

1-8

10

1

10

D

5

1

5

7

1

7

E

6

1

6

4

1

4

F

9

2

3-6

10

2

3-7

G

36

3

1-27

28

3

5-12

H

.

.

.

4

1

4

I

60

3

2-37

19

2

9-10

J

.

.

.

33

1

33

K

23

1

23

.

.

.

L

24

1

24

40

1

40

M

34

4

4-11

13

2

3-10

N

5

1

5

2

1

2

Total

282

30

 

255

27

 
  1. The number of clusters and the range of the cluster size are specified for each stratum.