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Formulas for nocturia evaluation
| Formula | Analysis |
|---|---|
| Nocturia index | |
| Ni = NUV/MW | Ni > 1: novturia is due to NUV exceeding MVV |
| Nocturnal polyuria index | |
| NPi = NUV/24 hV | NPi > 35%: diagnosis is nocturnal polyuria |
| Nocturnal bladder capacity index | |
| Ni - 1 = PNVa | NBCi > 0: nocturia occuring at volumes < MVV |
| NBCi = ANV - PNV |
Round up to next higher number if Ni - 1 is not an integer
