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. 2026 May 23;6:77. doi: 10.1186/s44158-026-00409-4

Table 3.

Patients characteristics

All patients
n = 166
Group 1 pre-SOP
n = 50
Group 2 post-SOP
n = 116
SMD
Age at diagnosis, median (IQR) 62 (52, 74) 62 (52, 76) 62 (52, 74) 0.130
Gender 0.109
 Male, n (%) 80 (48.2) 26 (52.0) 54 (46.6)
 Female, n (%) 86 (51.8) 24 (48.0) 62 (53.4)
Comorbidities 0.459
 None, n (%) 102 (61.4) 28 (56.0) 74 (63.8)
 Autoimmune disease, n (%) 2 (1.2) 1 (2.0) 1 (0.9)
 COPD, n (%) 8 (4.8) 1 (2.0) 7 (6.0)
 Diabetes mellitus, n (%) 12 (7.2) 7 (14.0) 5 (4.3)
 Cardiovascular disease, n (%) 6 (3.6) 1 (2.0) 5 (4.3)
 Liver cirrhosis, n (%) 11 (6.6) 3 (6.0) 8 (6.9)
 Renal insufficiency, n (%) 3 (1.8) 1 (2.0) 2 (1.7)
 Tumour disease, n (%) 22 (13.3) 8 (16.0) 14 (12.1)
Indication for EVD 0.397
 Stroke, n (%) 6 (3.6) 3 (6.0) 3 (2.6)
 Brain tumour, n (%) 19 (11.4) 4 (8.0) 15 (12.9)
 Hydrocephalus, n (%) 2 (1.2) 0 (0) 1 (1.7)
 ICH, n (%) 27 (16.3) 6 (12.0) 21 (18.1)
 ICH with intraventricular extension, n (%) 17 (10.2) 6 (12.0) 11 (9.5)
 IVH, n (%) 3 (1.8) 1 (2.0) 2 (1.7)
 SAH, n (%) 61 (36.7) 22 (44.0) 39 (33.6)
 TBI, n (%) 31 (18.7) 8 (16.0) 23 (19.8)
 SAPS II-Score at admission, median (IQR) 37 (32, 46) 39 (30, 55) 37 (32, 43) 0.360
 SOFA-Score at admission, median (IQR) 8 (4, 10) 8 (4, 10) 8 (4, 10) 0.089

Table rows displayed in bold indicates events with a higher incidence in Group 1 (pre-SOP)

While age, gender, and SOFA score at admission showed negligible differences in SMD calculation (SMD < 0.13), small-to-medium imbalances were observed in comorbidities (SMD = 0.459), indication for EVD (SMD = 0.397) and SAPS II score (SMD = 0.360)

Abbreviations: COPD chronic obstructive pulmonary disease, CSF cerebrospinal fluid, EVD external ventricular drainage, ICH Intracerebral haemorrhage, IQR interquartile range, IVH intraventricular haemorrhage, SAB subarachnoid haemorrhage, SAPS Simplified Acute Physiology Score, SMD Standardized Mean Difference, SOFA Sequential Organ Failure Assessment Score, TBI traumatic brain injury, n number