| Case | Singular | Plural |
|---|---|---|
| nom | diabetik | diabetici |
| gen | diabetika | diabetiků |
| dat | diabetikovi, diabetiku |
diabetikům |
| acc | diabetika | diabetiky |
| voc | diabetiku | diabetici |
| loc | diabetikovi, diabetiku |
diabeticích |
| instr | diabetikem | diabetiky |