Table 1

 Aggregate non-admission table for case 4

ParticipantReason for not admittingSuggested by
COPD, chronic obstructive pulmonary disease; CHF, congestive heart failure; CO2, carbon dioxide; HCO3, bicarbonate.
ICU1COPD severityThree recent hospital admissions
Nothing reversibleNo signs of chest infection
ICU2COPD severityThree recent hospital admissions
CHF[INFORMATION GIVEN]
Resp2COPD severity Nothing reversibleThree recent hospital admissions and blood gases indicating CO2 retention
Resp4COPD severityThree recent hospital admissions and blood gases (high HCO3)
CHF[INFORMATION GIVEN]
ICU4CHF[INFORMATION GIVEN]
Resp7COPD severityBlood gases
Another suspected co-morbidityBlood gases