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Table 2 Distribution of sample sizes according to field of study, statistical method and endpoint

From: A descriptive study of samples sizes used in agreement studies published in the PubMed repository

  

Sample size reported by studies

n

Median

Mean

Interquartile range

Range

Field of study

Allied Health

4

53.0

76.3

[45.0, 107.5]

[40, 159]

Medicine

45

80.0

259.0

[39.5, 180.0]

[11, 4469]

Radiology

29

50.0

206.2

[27.0, 142.5]

[10, 3082]

Surgery

4

52.0

955.8

[18.5, 1893.0]

[13, 3706]

Sample size justification

Yes

27

50.0

70.6

[27.0, 75.0]

[12, 275]

No

55

62.5

360.7

[35.3, 158.0]

[10, 4469]

Statistical method

Bland–Altman LoA

41

65.0

89.0

[34.5, 124.0]

[12, 278]

ICC

29

42.0

221.7

[27.0, 64.5]

[12, 4469]

Kappa coefficient

35

71.0

376.9

[50.0, 233.0]

[10, 3706]

Significance test

20

54.5

86.2

[26.5, 128.0]

[12, 267]

Other

32

57.0

430.7

[38.0, 124.5]

[10, 4469]

Endpoint

Continuous

46

49.5

74.8

[25.0, 100.0]

[11, 265]

Categorical

28

119.0

448.1

[50.0, 271.0]

[10, 3706]

Both

8

72.5

721.6

[59.0, 500.5]

[40, 4469]

  1. ICC intraclass correlation, LoA limits of agreement