Comparison of emergency department and hospital admissions data for air pollution time-series studies

Table 3 Spearman correlations between daily outcome counts for each visit type

Outcome		All ED	All HA	Non-elective HA
All visits	All HA	0.35
	Non-elective HA	0.38	0.94
	HA through ED	0.63	0.73	0.78
RD	All HA	0.72
	Non-elective HA	0.75	0.97
	HA through ED	0.77	0.93	0.97
Asthma/Wheeze	All HA	0.62
	Non-elective HA	0.63	0.96
	HA through ED	0.63	0.93	0.96
Pneumonia	All HA	0.81
	Non-elective HA	0.83	0.96
	HA through ED	0.85	0.93	0.96
CVD	All HA	0.73
	Non-elective HA	0.83	0.89
	HA through ED	0.90	0.71	0.85
Dysrhythmia	All HA	0.58
	Non-elective HA	0.68	0.85
	HA through ED	0.74	0.72	0.89
CHF	All HA	0.78
	Non-elective HA	0.87	0.91
	HA through ED	0.92	0.82	0.92

RD respiratory disease group, CVD cardiovascular disease group, CHF congestive heart failure, ED emergency department, HA hospital admission.

ISSN: 1476-069X