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Table 3 Level of agreement

From: The use of diagnostic coding in chiropractic practice

Chiropractor ID

Number of diagnoses coded

Agreement on * rubric level (%)

Agreement on ** term level (%)

1

9

89

67

2

20

15

10

3

12

92

50

4

15

60

0

5

14

29

29

6

9

67

56

7

14

29

7

8

10

100

100

9

16

44

31

10

11

82

73

11

10

100

10

12

11

27

18

13

12

0

0

14

4

75

0

Overall agreement %

 

52

35

Agreement expected by chance

 

17

6

Overall agreement (Cohen’s Kappa)

Total number of codes: 167

0.4 (95% CI 0.3-0.7)***

0.3 (95% CI 0.2-0.5)***

  1. *Rubric level: ICPC-2 classifies symptoms/complaints, problems/diagnoses and process of care using three character codes called a rubric. The first character, a letter, represents a chapter or a body system and the two additional characters, a number, represent a concept within this body system.
  2. **Term level: To allow for greater specificity, the ICPC-2 PLUS terminology was developed. Each PLUS term is classified to ICPC-2. ICPC-2 PLUS uses a six-character identifier by adding another three digits (a code) to the ICPC-2 rubric, to which the term has been classified.
  3. ***CI = 95% confidence interval.