Table 1 Case-Control Matching Statistics.

From: Parental non-hereditary teratogenic exposure factors on the occurrence of congenital heart disease in the offspring in the northeastern Sichuan, China

Match Type

Count

Exact Matches

124

Fuzzy Matches

198

Unmatched Including Missing Keys

45

Unmatched With Valid Keys

45

Sampling

Without Replacement

Log File

None

Maximize Matching Performance

Yes