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Table 4 Spearman rank correlations between residential exposure in the 3rd trimester study population (n = 81)

From: Residential exposure to air pollution and access to neighborhood greenspace in relation to hair cortisol concentrations during the second and third trimester of pregnancy

  BC NO2 Distance to major road Small greenspace Large greenspace Noise ADI
PM2.5 0.61* 0.55* −0.06 −0.19* − 0.31* 0.01 0.04
BC 0.89* −0.24* −0.22* − 0.30* 0.18 0.31*
  NO2 −0.32* −0.21* − 0.28* 0.24* 0.39*
   Distance to major road 0.13 0.26* −0.31* − 0.25*
    Small greenspace 0.41* −0.37* −0.08
     Large greenspace −0.15* −0.19
      Noise 0.25*
  1. *Significant correlations (p < 0.05)
  2. Note: Air pollutants were modelled at the maternal home address, 3-month mean concentrations were calculated. Major roads include E- or N-roads. Access to small neighborhood greenspace is defined as access to > 0.2 ha (ha) of greenspace within a travel distance of 400 m (m) from residence, access to large neighborhood greenspace is defined as access to > 10 ha of greenspace within a travel distance of 800 m from residence. Noise exposure is evaluated as exposure above the WHO health-based guideline of 53 dB Lden (day–evening–night noise level). ADI Area deprivation index, NO2 Nitrogen dioxide, PM2.5 Fine particulate matter with an aerodynamic diameter ≤ 2.5 μm, BC Black carbon