Association of CRI with STEMI by study seasons (Table 3):
Overall, the proportions of STEMI were similar between AMI cases with or without CRI during either non-influenza and influenza seasons. However, STEMI proportion was slightly higher among patients with CRI than patients without CRI during 2017-influenza season and during non-influenza season. Nevertheless, the adjusted relative risks for association of CRI with STEMI were around 1 during different study seasons which was statistically not significant.