Summary characteristics of patients hospitalised for myocardial infarction categorised by exposure to environmental tobacco smoke.

MWU, chi square for trend.N number; SIMD5 Scottish Index of Multiple Deprivation quintile; MDA; LDL; IQR interquartile range.曼-惠特尼U检验（Mann-Whitney U test, MWU）、趋势卡方检验、样本量（N值）；苏格兰多重贫困指数五分位（Scottish Index of Multiple Deprivation quintile, SIMD5）；丙二醛（Malondialdehyde, MDA）；低密度脂蛋白（Low-Density Lipoprotein, LDL）；四分位距（interquartile range, IQR）。