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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2010 Jan;19(1):196–200. doi: 10.1158/1055-9965.EPI-09-0335

Table 2.

Measures of agreement between self-reports and medical records with regards to reason for colorectal cancer testing, stratified by test type

Concordance1 Positive
Predictive
Value2 		Negative
Predictive
Value3 		Sensitivity4 Specificity5
SIG 91.7% 97.0% 27.3% 94.2% 42.9%
COL 78.2% 79.8% 71.4% 92.7% 43.9%
1

NOTE: Concordance is the proportion of patients who correctly reported receiving a CRC test for screening or for diagnosis compared with the medical record.

2

Positive predictive value is the number of patients correctly reporting receipt of a screening CRC test over all patients reporting receipt of screening CRC test.

3

Negative predictive value is the number of patients correctly reporting receipt of a diagnostic CRC test over all patients reporting receipt of a diagnostic CRC test.

4

Sensitivity is the number of patients correctly reporting receipt of a CRC test for screening over all patients who had a screening CRC test according to the combined medical record.

5

Specificity is the number of patients correctly reporting receipt of a CRC test for diagnosis over all patients who had a diagnostic CRC test according to the combined medical record.

Abbreviations: SIG= sigmoidoscopy, COL=colonoscopy