Table 1 Baseline demographic characteristics of the patients
Total (1999–2017) (N = 353) | Primary deterioration (N = 86) | Total (1999–2013) (N = 259) | Secondary deterioration (N = 53) | Shunt insufficiency (N = 14) | Secondary non-responder (N = 31) | Drop-outs (N = 8) | Test and p-value | |
|---|---|---|---|---|---|---|---|---|
Age (years) (at the time of surgery) | ||||||||
Mean (median) ± SD | 71.4 (72) ± 10 | 74 (72) ± 10 | 71 (72) ± 10 | 70 (72) ± 11 | 68.5 (68) ± 8 | 73.3 (72) ± 4.2 | 74.9 (77) ± 8.6 | Kruskal–Wallis test p = ns |
Sex | ||||||||
Female n (%) | 146 (42%) | 40 (47%) | 104 (40%) | 22 (41%) | 4 (28%) | 15 (48%) | 3 (38%) | Chi-square test p = ns |
Male n (%) | 207 (58%) | 46 (53%) | 155 (60%) | 31 (59%) | 10 (72%) | 16 (52%) | 5 (62%) | |
Pre-VPS CMI | ||||||||
Mean (median) ± SD | 2.6 (3) ± 1.9 | 2.2 (2) ± 1.9 | 2.7 (3) ± 2 | 2.5 (2) ± 2 | 2.2 (3) ± 1.8 | 2.7 (2) ± 2.3 | 2.1 (1.5) ± 2.1 | Kruskal–Wallis test p = ns |
Kiefer score | ||||||||
Mean (median) ± SD | 7.1 (7) ± 2.9 | 6.1 (6) ± 2.7 | 7.6 (7) ± 3 | 6.8 (7) ± 2.7 | 7 (7) ± 3.6 | 6.8 (7) ± 2.3 | 6.9 (6.5) ± 2.2 | Kruskal–Wallis test p = ns |