Table 3.

 Procedural characteristics and door-to-balloon time in patients undergoing primary percutaneous coronary intervention for ST elevation myocardial infarction. Figures are percentages of patients unless stated otherwise

	Overall	Door-to-balloon time (minutes)				Overall P	P for trend
		<60	60-89	90-119	≥120
No of patients	43 801	9971	15 388	10 208	8234	—	—
Weekend procedure	28.2	17.0	28.2	34.7	33.7	<0.001	<0.001
Time of presentation:
Weekday 0000-0759	17.0	11.2	16.7	20.5	20.2	<0.001	—
Weekday 0800-1559	32.8	52.8	31.9	21.9	23.6
Weekday 1600-2359	22.0	19.0	23.2	22.9	22.6
Weekend 0000-0759	6.6	3.1	6.0	9.4	8.7
Weekend 0800-1559	12.5	8.6	12.6	14.5	14.4
Weekend 1600-2359	9.0	5.3	9.5	10.8	10.5
Angiographic findings
Mean (SD) No of lesions	1.3 (0.6)	1.3 (0.6)	1.3 (0.6)	1.3 (0.6)	1.4 (0.7)	0.035	0.022
Stenosis locations:
Left main	2.7	2.2	2.7	2.8	3.4	<0.001	<0.001
Left anterior descending	55.0	51.4	54.0	56.2	59.6	<0.001	<0.001
Circumflex	33.3	29.8	31.8	34.6	38.4	<0.001	<0.001
Right coronary artery	59.8	60.7	60.5	59.9	57.4	<0.001	<0.001
IABP used	10.8	10.0	10.4	11.0	12.4	<0.001	<0.001
Thrombin inhibitors	10.8	11.3	10.7	9.9	11.4	0.003	0.61
Non-stent device used	90.6	91.8	91.4	90.2	88.1	<0.001	<0.001
SCAI classification:
Not reported	0.5	0.4	0.5	0.6	0.7	<0.001	—
I	16.5	14.1	15.6	17.6	19.6
II	19.6	17.2	18.9	21.1	22.1
III	21.2	23.3	21.8	20.0	18.8
IV	42.2	45.0	43.2	40.6	38.7

IABP=intra-aortic balloon pump, SCAI=Society for Cardiac Angiography and Interventions.