Table 3.
Comparison of the two patient groups
| Shunt insufficiency (N = 14) | Secondary non-responder (N = 31) | Test and p-value | |
|---|---|---|---|
| Age | |||
| Mean (median) ± SD (at the time of surgery) | 68.5 (68) ± 8 | 73.3 (72) ± 4.2 |
t-test p = 0.01 |
| Pre-VPS CMI | |||
| Mean (median) ± SD | 2.2 (3) ± 1.8 | 27 (2) ± 2.3 |
Mann–Whitney test p = ns |
| Kiefer score | |||
| Mean (median) ± SD | 7 (7) ± 3.6 | 6.8 (7) ± 2.3 |
Mann–Whitney test p = ns |
| New diseases during the F/U (stroke, Alzheimer disease, Parkinson disease) | 1 (7%) | 6 (19%) |
Fisher’s exact test p = ns |
| Over-drainage requiring valve pressure setting ≥ 100 mmH2O | 0 (0%) | 5 (16%) |
Fisher’s exact test p = ns |
CMI Comorbidity Index, VPS ventriculoperitoneal shunt, F/U follow-up