Substantial surveillance bias in an unblinded study of pain and adverse effects associated with nitrous oxide inhalation or standard medication for colonoscopy.
Faddy
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D000280:Administration, Inhalation; D018712:Analgesics, Non-Narcotic / Q000009:adverse effects*; D000701:Analgesics, Opioid / Q000009:adverse effects*; D018686:Anesthetics, Intravenous / Q000009:adverse effects*; D003113:Colonoscopy; D006801:Humans; D008614:Meperidine / Q000009:adverse effects*; D008874:Midazolam / Q000009:adverse effects*; D009609:Nitrous Oxide / Q000008:administration & dosage / Q000009:adverse effects*; D010146:Pain / Q000209:etiology*; D012107:Research Design
D018712:Analgesics, Non-Narcotic; D000701:Analgesics, Opioid; D018686:Anesthetics, Intravenous; D008614:Meperidine; D009609:Nitrous Oxide; D008874:Midazolam