Table 3.

Procedural related complications of patients with acute coronary syndrome treated with percutaneous coronary intervention according to winter and non-winter weeks in polluted and non-polluted regions

Type of procedural related complication	All patients, N = 8740	Winter weeks, N = 2408	Non-winter weeks, N = 6332	P value
Overall (%)	2.391	2.616	2.3	0.39
Myocardial infarction (%)	0.114	0.124	0.11	0.86
CAP (%)	0.205	0.166	0.221	0.61
Allergic reactions (%)	0.034	0.041	0.031	0.82
Bleedings (%)	0.274	0.041	0.363	0.01
No-reflow (%)	0.652	0.872	0.568	0.11
Cardiac arrest (%)	0.835	0.955	0.789	0.44
Death (%)	0.434	0.498	0.41	0.57
Dissection (%)	0.197	0.383	0.126	0.02
Cerebral stroke (%)	0.013	0.047	0	0.1

CAP coronary artery perforation