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| Sitagliptin | Cases receiving thyroid sonography/aspiration | P | |||
|---|---|---|---|---|---|
| No | Yes | ||||
| n | % | n | % | ||
| I. Original sample | |||||
| Never users | 307975 | 98.44 | 4878 | 1.56 | <0.0001 |
| Ever users | 57529 | 98.78 | 709 | 1.22 | |
| II. Matched sample | |||||
| Never users | 56715 | 98.36 | 944 | 1.64 | <0.0001 |
| Ever users | 56960 | 98.79 | 699 | 1.21 | |
