Skip to main content

Table 3 Association of time-of-day at symptom onset with area at risk > median, final infarct size > median or salvage index > median

From: Time-of-day at symptom onset was not associated with infarct size and long-term prognosis in patients with ST-segment elevation myocardial infarction

Risk estimate Time-of-day at symptom onset (hours) p-value
0–6 h (n = 273) 6–12 h (n = 355) 12–18 h (n = 309) 18–24 h (n = 269)
Area at risk > median
 OR (95% CI) 0.916 (0.668–1.256)1 Ref 1.075 (0.792–1.459)2 0.813 (0.592–1.117)3 0.591
0.642
0.813
 ORadj* (95% CI) 0.871 (0.617–1.231)1 Ref 0.990 (0.711–1.380)2 0.841 (0.582–1.216)3 0.441
0.952
0.363
Final infarct size > median
 OR (95% CI) 1.030 (0.751–1.413)1 Ref 0.969 (0.714–1.315)2 0.916 (0.667–1.257)3 0.851
0.842
0.593
 ORadj* (95% CI) 1.054 (0.757–1.467)1 Ref 1.024 (0.722–1.361)2 1.024 (0.720–1.456)3 0.761
0.962
0.893
Salvage index > median
 OR (95% CI) 0.873 (0.633–1.205)1 Ref 0.948 (0.694–1.295)2 0.994 (0.719–1.375)3 0.411
0.742
0.973
 ORadj* (95% CI) 0.827 (0.591–1.157)1 Ref 0.894 (0.647–1.234)2 0.913 (0.638–1.305)3 0.271
0.502
0.623
  1. *Adjusted for hypercholesterolemia, anterolateral location of MI, time to admission, door to balloon time, and presentation during office hours
  2. Data are presented as odds ratios (OR) with 95% confidence interval (CI) with time-of-day at symptom onset 0–6 h serving as a reference (Ref)
  3. 10–6 h time interval vs. reference time interval
  4. 212–18 h time interval vs. reference time interval
  5. 318–24 h time interval vs. reference time interval