Table 3. Infarct size following propensity score matching in main cohort and subgroups.

	UFH pretreatment	No pretreatment	Calculated difference [95% CI] (UFH pretreatment as reference category)
PSM cohort	N = 511	N = 187
Maximum CK, U/L: median (IQR)	1248 (2426)	1376.5 (2365)	−134 U/L [−611; 341]
PSM subgroup: resuscitated patients	n = 79	n = 35
Maximum CK, U/L: median (IQR)	2889 (3416)	3350 (7251)	−51 U/L [−2571; 2469]
PSM subgroup: non-resuscitated patients	n = 184	n = 71
Maximum CK, U/L: median (IQR)	872.5 (1790)	1060 (2481)	−175 U/L [−745; 396]
PSM subgroup: patients with OAC	n = 65	n = 27
Maximum CK, U/L: median (IQR)	813 (1785)	520 (1672)	769 U/L [−344; 1882]
PSM subgroup: patients without OAC	n = 162	n = 64
Maximum CK, U/L: median (IQR)	1293 (2213)	1421 (2337)	−519 U/L [−1242; 203]

CI, Confidence interval; CK, creatine kinase; IQR, interquartile range; UFH, unfractionated heparin