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Table 2 Validation measures 1 for colorectal surgery in physician billing and hospital inpatient data compared to the Alberta Cancer Registry overall and by year of diagnosis, stage and tumor site

From: Validation of colorectal cancer surgery data from administrative data sources

 

Physician Billing Data

Hospital Inpatient Data

Combined Administrative Data

     

Observed

    

Observed

    

Observed

Factors

Sens.

Spec.

PPV

NPV

Agreement

Sens.

Spec.

PPV

NPV

Agreement

Sens.

Spec.

PPV

NPV

Agreement

 

%

%

%

%

%

%

%

%

%

%

%

%

%

%

%

All

97

72

95

79

93

94

80

96

72

92

97

68

95

79

93

Year

               

2000

97

692

95

772

93

96

832

97

752

94

97

642

95

792

93

2001

97

672

94

782

92

95

802

96

742

93

97

622

93

772

91

2002

97

702

95

772

93

95

772

96

702

92

97

652

95

782

92

2003

97

802

97

802

94

94

812

97

702

92

97

742

96

812

94

2004

97

742

95

832

93

94

832

96

762

92

97

722

94

842

93

2005

96

742

95

782

92

93

792

96

682

91

96

692

94

772

92

Stage

               

I

91

883

100

53

91

87

883

100

43

87

91

883

100

53

91

II

99

493

99

503

98

97

633

99

323

97

99

413

99

523

98

III

99

703

99

543

99

98

783

100

313

97

99

703

100

593

99

IV

99

692

82

98

87

97

79

87

94

89

99

642

80

98

85

Missing

88

822

862

842

85

852

862

89

822

85

88

782

842

842

84

Tumor Site

               

Colon

97

752

96

80

94

95

85

97

75

94

97

732

95

80

93

Rectal

96

692

94

782

92

93

732

95

672

90

97

602

93

782

91

  1. 1 The width of the 95% confidence interval for estimates without a superscript are < 6%.
  2. 2 Width of the 95% confidence interval is 6 – 14%.
  3. 3 Unstable estimate: width of 95% confidence interval is >14% and/or the width of the interval is >40% of the value of the estimate.