| GP05 | Kidney is not functioning well, renal impairment |
| GP08 | Kidneys are not working as well as they should |
| GP10 | Kidney problems, leaky kidneys |
| GP18 | Your kidneys aren’t great |
| GP19 | Your kidney is not coping well, not able to function on its optimal level |
| GP22 | Your kidneys aren’t functioning quite as well as they should be |
| GP25 | Your kidneys aren’t working very well, aren’t functioning as well as they could |
| GP30 | Your kidneys are not functioning as well as they previously did in the past |
| GP32 | Kidneys are not working as well as they used to do — as well as we would like them to |
| GP36 | Your kidneys aren’t working as well as they should be, kidney impairment |
| GP41 | Kidney problem, your kidneys aren’t functioning as well as they ought |
| GP44 | Renal insufficiency, deteriorating kidney function |
| GP50 | The kidneys aren’t functioning as well as when they were younger |
| GP51 | A drop in kidney function or renal function, chronic kidney injury |
| GP57 | Kidney dysfunction, (kidneys) are not working as efficiently as they could or should |
| GP61 | Kidney damage |
| GP62 | Renal failure or kidney failure |
| GP66 | Kidneys aren’t working at 100% |
| GP69 | Chronic kidney problem or chronic kidney issue |
| GP75 | Your kidneys aren’t working as well as they should be |