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Table 1 Baseline characteristics of the participants

From: A positioning pillow to improve lumbar puncture success rate in paediatric haematology-oncology patients: a randomized controlled trial

  Pillow group n = 62 Control group n = 62 P
  median (min, max)
Age (years) 6.63 (2.18–17.48) 7.70 (2.02–16.68) 0.60
Status, Lansky or Karnofsky score (%) 100 (40–100) 100 (40–100) 0.86
Platelet count 189.5 (11–660) 201.5 (24–609) 0.63
Number of previous LP 2 (0–16) 2 (0–16) 0.82
  N (%)
Male 38 (61.3) 37 (59.7) 0.85
Previous LP 55 (88.7) 57 (91.9) 0.54
Description of the LP (n, %)
Premedication 21 (33.9) 15 (24.2) 0.24
EMLA® 61 (98.4) 61 (98.4) 1
Entonox 57 (91.9) 60 (96.8) 0.24
Purpose of LP    0.3
Diagnosis* 7 (11.3) 7 (11.3)  
Disease follow-up 10 (16.1) 4 (6.5)  
Treatment injection 45 (72.6) 51 (82.3)  
  Median (min-max)
LP duration (minutes) 4 (1–33) 4 (2–19) 0.52§
Number of attempts 1 (1–5) 1 (1–4) 0.98§
Amount of CSF** withdrawn (drops) 20 (10–34) 20 (20–40) 0.3§
Number of attending persons 4(2–7) 4 (2–5) 0.5§
LP performed in sitting position (first attempt), (n, %) 62 (100) 62 (100)  
  1. * Diagnostic LPs can be performed for relapse diagnosis, or to verify the efficacy of treatment. It is therefore possible for children to have a diagnostic LP and several previous LPs
  2. ** CSF = cerebrospinal fluid
  3. § Mann & Whitney test