Table 2.

Matching result between cancer-screening and cancer-registration data (excerpt).

Classa and matching key		False positive, n	False negative, n	Sensitivity (%)	Specificity (%)
Colorectal cancer
	Birth date, first name (kana)	3	27	55.00	99.85
	Birth date, first name (kana), family name (kana)	0	31	48.33	100
	Birth date, sex, first name (kana)	2	28	53.33	99.90
	Birth date, sex, family name (kana)	1	29	51.67	99.95
Breast cancer
	Birth date, family name (kana)	2	7	88.71	99.80
	Birth date, family name (kanji)	2	7	88.71	99.80
	Birth date, first name (kanji)	1	9	85.48	99.90
	Birth date, first name (kana), family name (kanji)	0	11	82.26	100

^aResults of the matching experiment between cancer-screening and cancer registration data for each matching key used. Cases in which all key data shown in the matching-key column successfully corresponded were considered positive matches.