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Table 5 Relative risk of hemorrhagic stroke stratified by sex and age group, based on pollutants

From: Association between hemorrhagic stroke occurrence and meteorological factors and pollutants

  PM10 (μg/m3) NO2 (ppb) O3 (ppb)
  RR (95 % CI) P RR (95 % CI) P RR (95 % CI) P
HS 1.053 (1.017–1.091) .003 1.060 (0.984–1.143) .126 1.079 (1.013–1.150) .018
 Men 1.053 (1.005–1.104) .031 1.079 (0.975–1.194) .143 1.046 (0.959–1.139) .310
 Women 1.053 (1.000–1.109) .048 1.038 (0.929–1.160) .510 1.121 (1.021–1.231) .017
 <60 years 1.033 (0.987–1.081) .161 1.005 (0.912–1.107) .926 1.167 (1.075–1.266) <.001
 ≥60 years 1.084 (1.026–1.144) .004 1.146 (1.019–1.290) .023 0.962 (0.870–1.064) .454
ICH 1.071 (1.027–1.117) .001 1.108 (1.013–1.213) .026 1.025 (0.949–1.106) .530
 Men 1.063 (1.008–1.120) .023 1.123 (1.002–1.258) .047 1.006 (0.913–1.108) .908
 Women 1.085 (1.013–1.162) .019 1.085 (0.936–1.257) .280 1.057 (0.933–1.198) .381
 <60 years 1.022 (0.967–1.080) .437 1.015 (0.902–1.142) .800 1.084 (0.981–1.198) .114
 ≥60 years 1.143 (1.071–1.219) <.001 1.252 (1.088–1.440) .002 0.948 (0.841–1.068) .376
SAH 1.014 (0.952–1.080) .667 0.959 (0.839–1.098) .547 1.167 (1.059–1.286) .002
 Men 1.016 (0.916–1.127) .765 0.926 (0.742–1.157) .500 1.240 (1.054–1.460) .010
 Women 1.013 (0.936–1.096) .754 0.979 (0.827–1.160) .809 1.129 (1.000–1.274) .051
 <60 years 1.056 (0.975–1.144) .180 0.982 (0.828–1.166) .839 1.273 (1.125–1.441) <.001
 ≥60 years 0.949 (0.857–1.051) .311 0.924 (0.743–1.148) .474 1.018 (0.869–1.192) .828
  1. HS Hemorrhagic stroke, ICH Intracerebral hemorrhage, SAH Subarachnoid hemorrhage, RR Relative risk, CI Confidence interval, PM 10 Particulate matter less than 10 mm in aerodynamic diameter, NO 2 Nitrogen dioxide, O 3 Ozone