Table 1.
Baseline characteristics for the 979 patients operated for iNPH 2004–2011
| iNPH patients, n = 979 | |
|---|---|
| Demography | |
| Age (years), median (IQR) | 74 (68–78) |
| Sex, female, n (%) | 413 (42) |
| Symptom grading scales | Median (IQR) |
| Gait scale (n = 835) | 4 (3–6) |
| Balance scale (n = 747) | 3 (3–5) |
| Continence scale (n = 814) | 3 (2–4) |
| MMSE (n = 737) | 25 (20–28) |
| mRS (n = 755) | 2 (2–3) |
| Vascular comorbidity | n (%) |
| Hypertension (n = 891) | 438 (49) |
| Diabetes Mellitus (n = 887) | 189 (21) |
| History of stroke (n = 874) | 119 (14) |
| Heart disease (n = 892) | 231 (26) |
| Claudication (n = 458) | 7 (1.5) |
| Number of vascular comorbidities | n (%) |
| 0 | 372 (38) |
| 1 | 316 (32) |
| 2 | 205 (21) |
| 3 | 74 (7.6) |
| 4 | 9 (0.9) |
| 5 | 0 |
| None available | 3 (0.3) |
| Number of comorbidities, median (IQR) | 1 (0–2) |
| Type of primary surgery, n | n |
| Shunt | 974 |
| VP/VA/not specified | 953/6/15 |
| Ventriculostomy | 5a |
aThree out of five patients first operated with ventriculostomy were re-operated with shunt insertion (after 2 weeks, 6 weeks and 8 months)
INPH idiopathic normal pressure hydrocephalus, IQR interquartile range, MMSE mini-mental state examination, mRS modified Rankin Scale