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Table 2 Spearman’s rank correlation coefficients between the age-adjusted cancer incidence rate and the various air pollutants by gender and urbanization degrees

From: Associations between ambient air pollution and cancer incidence in Taiwan: an ecological study of geographical variations

 MenWomen
PM2.5PM10SO2NOxO3PM2.5PM10SO2NOxO3
Metropolises0.457a0.2760.515a−0.3260.465a0.2140.236−0.037−0.3440.542a
Cities0.2800.327a0.3000.083−0.2100.1320.1950.1630.131−0.050
Developing towns0.599b0.340a0.0220.334a−0.1360.2440.285a−0.0250.356a0.070
General towns0.450b−0.0110.340a0.013−0.1510.248a−0.0990.236a−0.022−0.128
Aged towns0.664b0.1440.179−0.1020.2250.634b−0.0670.305−0.2350.336
Agricultural towns0.247−0.1470.211−0.240−0.1380.122−0.0170.211−0.1810.028
Villages0.371a−0.0500.2140.0150.106−0.218−0.002− 0.0430.029− 0.094
  1. aindicates significance at an alpha level of 0.05
  2. bindicates significance at the Bonferroni-corrected alpha level of 0.000714 (a total of 70 hypothesis tests being performed)