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Table 1 Sample characteristics

From: Children's vomiting following posterior fossa surgery: A retrospective study

Parameter  
Number of Patients 249
Site n(%)  
   Stollery Children's Hospital 55 (22.1%)
   Hospital for Sick Children 194 (77.9%)
Length of hospital stay in days (Mean ± SD, Range) 11 (± 21, 2–305)
Age in years (Mean ± SD, Range) 7.6 ± 4.4, 0.3–-16.8
Age in Quartiles n(%)  
   0 to <4 years 65 (26.1%)
   4 to <7 years 61 (24.5%)
   7 to < 12 years 75 (30.1%)
   12 to <17 years 48 (19.3%)
Male: Female (Ratio %) 128 (51.4%):121 (48.6%)
Surgery n(%)  
   Brain Tumour 153 (61.4%)
   Chiari I Malformation 81 (32.5%)
   Other 15 (6.0%)
Chiari II Malformation 7 (2.8%)
Vascular Malformation 4 (1.6%)
Cyst or Aspiration of Pus 4 (1.6%)
Presenting with vomiting n(%) 115 (46.2%)
Preoperative Dexamethasone n(%)1 136 (54.6%)
Intraoperative Ondansetron 117 (47.0%)
   Without Dexamethasone 47 (18.9%)
Intraoperative Dexamethasone 131 (52.6%)
   Without Ondansetron 61 (24.5%)
Intraoperative Ondansetron and Dexamethasone 70 (28.1%)
No intraoperative anti-emetic 71 (28.5%)
Length of surgery in hours (Mean ± SD, Range) 5:01 ± 2:10 (1:39–17:56)
Length of anaesthesia in hours (Mean ± SD, Range) 6:22 ± 2:20 (2:05–20:15)
Type of volatile anaesthetic n(%)  
   Isoflurane 126 (50.6%)
   Desflurane 46 (18.5%)
   Isoflurane + Sevoflurane 32 (12.9%)
   Sevoflurane 22 (8.8%)
   Isoflurane + Desflurane 8 (3.2%)
   Sevoflurane + Desflurane 2 (0.8%)
   Not recorded/not legible 13 (5.2%)
Use of Nitrous Oxide** 7 (2.8%)
Received Postoperative Anti-emetic (%) 199 (79.9%)
Opioid administration initiated by the first 24 hours (%) 228 (91.6%)
  1. *All but one child who received preoperative dexamethasone had a brain tumour.
  2. **For induction only as no nitrous oxide was used for maintenance of anaesthesia.