Table 2 Length of time from admission to alarm, alarm to diagnostic action, admission to diagnosis, and diagnosis to treatment via the COS alarm system.

Duration^a (From→To)	Stage I (42 patients)	Stage II^b (12 patients)	P-value^c
Admission → Alarm	5(0,20) days	2(0,14) days	0.255
Alarm → Diagnostic action	1(0,16) days	2(0, 10) days	0.041*
Admission → Diagnosis	18(2,163) days	14(4,55) days	0.435
Diagnosis → Treatment	0(0,7) days	0(0,2) days	0.934

^a Duration expressed as median (minimum, maximum) days.
^b The duration from admission to alarm in Stage II was less than 5 days because some patients self-reported coughing prior to admission.
^C p-value determined by non-parametric Wilcoxon rank-sum test.
* p-value less than 0.05

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