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Table 3 The cumulative relative risks of adverse pregnancy outcomes in high and low PET a values relative to PET = 22.5 °C

From: Association between Physiological Equivalent Temperature (PET) with adverse pregnancy outcomes in Ahvaz, southwest of Iran

Repercussions

PET value(°C)

Lag 0

Lag 0–2

Lag 0–6

Lag 0–13

Lag 0–21

Stillbirth

Hb

45.4

1.980 (1.097–3.574)

1.602 (0.793–3.234)

1.282 (0.505–3.253)

1.747 (0.457–6.676)

1.750 (0.315–9.707)

43.6

1.667 (0.960–2.895)

1.425 (0.746–2.722)

1.166 (0.501–2.711)

1.396 (0.422–4.616)

1.350 (0.299–6.093)

42.5

1.515 (0.887–2.587)

1.334 (0.716–2.485)

1.105 (0.496–2.461)

1.228 (0.401–3.763)

1.161 0.288–4.69)

Lc

16.9

0.961 (0.810–1.140)

0.956 (0.782–1.168)

0.903 (0.694–1.174)

0.930 (0.638–1.359)

1.116 (0.691–1.802)

9.9

1.023 (0.734–1.426)

0.888 (0.601–1.311)

0.655 (0.392–1.093)

0.620 (0.298–1.288)

0.770 (0.304–1.955)

6.4

0.894 (0.606–1.319)

0.752 (0.486–1.163)

0.579 (0.334–1.004)

0.589 (0.270–1.288)

0.747 (0.277–2.016)

LBW

H

45.4

0.918 (0.349–2.416)

1.280 (0.422–3.885)

4.966 (1.161–21.241)

7.181 (0.860-59.949)

2.938 (0.192–45.004)

43.6

0.848 (0.341–2.111)

1.239 (0.443–3.467)

4.180 (1.099–15.896)

5.278 (0.764–36.458)

2.367 (0.203–27.641)

42.5

0.812 (0.334–1.973)

1.213 (0.45–3.269)

3.758 (1.047–13.493)

4.383 (0.7-27.463)

2.069 (0.204–20.939)

L

16.9

1.425 (1.100-1.846)

1.299 (0.955–1.768)

1.277 (0.835–1.951)

2.058 (1.067–3.972)

2.613 (1.084–6.296)

9.9

1.650 (1.021–2.666)

1.338 (0.754–2.373)

1.254 (0.573–2.743)

2.230 (0.664–7.496)

2.450 (0.478–12.550)

6.4

1.004 (0.522–1.932)

0.983 (0.476–2.030)

0.775 (0.314–1.915)

0.732 (0.179–2.993)

0.788 (0.131–4.729)

PTL

H

45.4

1.1060 (0.755–1.621)

0.968 (0.614–1.526)

0.745 (0.405–1.368)

0.772 (0.313–1.907)

0.962 (0.294–3.147)

43.6

1.154 (0.805–1.653)

1.030 (0.674–1.575)

0.822 (0.471–1.434)

0.879 (0.392–1.969)

1.068 (0.377–3.024)

42.5

1.179 (0.831–1.673)

1.065 (0.707–1.606)

0.868 (0.511–1.476)

0.942 (0.443–2.006)

1.128 (0.431–2.956)

L

16.9

0.971 (0.866–1.089)

0.892 (0.780–1.019)

0.855 (0.719–1.017)

0.854 (0.667–1.094)

0.801 (0.585–1.097)

9.9

0.930 (0.752–1.149)

0.773 (0.605–0.988)

0.713 (0.521–0.974)

0.758 (0.488–1.176)

0.695 (0.398–1.211)

6.4

0.964 (0.761–1.220)

0.892 (0.691–1.152)

0.974 (0.707–1.340)

1.212 (0.762–1.925)

1.219 (0.676–2.198)

SA

H

45.4

0.903 (0.612–1.333)

0.971 (0.611–1.541)

0.966 (0.522–1.786)

0.852 (0.349–2.080)

0.978 (0.311–3.079)

43.6

0.867 (0.605–1.244)

0.978 (0.641–1.491)

1.002 (0.576–1.743)

0.855 (0.386–1.893)

0.982 (0.359–2.688)

42.5

0.849 (0.599–1.204)

0.982 (0.656–1.471)

1.023 (0.605–1.728)

0.860 (0.409–1.808)

0.986 (0.388–2.506)

L

16.9

1.032 (0.921–1.156)

1.055 (0.923–1.205)

1.021 (0.855–1.218)

0.971 (0.749–1.259)

0.968 (0.695–1.350)

9.9

1.088 (0.874–1.354)

1.140 (0.881–1.476)

1.095 (0.778–1.541)

1.089 (0.662–1.791)

1.172 (0.619–2.218)

6.4

1.022 (0.799–1.308)

1.053 (0.798–1.389)

1.007 (0.707–1.435)

1.015 (0.610–1.689)

1.125 (0.586–2.160)

Pre-Eclampsia

H

45.4

0.838 (0.557–1.262)

0.809 (0.496–1.318)

1.033 (0.540–1.977)

1.436 (0.560–3.682)

1.580 (0.471–5.306)

43.6

0.831 (0.568–1.215)

0.784 (0.501–1.229)

0.979 (0.544–1.764)

1.291 (0.558–2.983)

1.347 (0.465–3.898)

42.5

0.827 (0.572–1.196)

0.772 (0.502–1.188)

0.951 (0.544–1.663)

1.213 (0.554–2.655)

1.227 (0.46–3.275)

L

16.9

1.110 (0.985–1.250)

0.997 (0.866–1.146)

0.838 (0.697–1.007)

0.886 (0.682–1.152)

1.018 (0.733–1.413)

9.9

1.216 (0.964–1.533)

0.990 (0.755–1.297)

0.738 (0.519–1.049)

0.767 (0.466–1.262)

0.807 (0.431–1.511)

6.4

1.195 (0.923–1.547)

1.034 (0.778–1.374)

0.926 (0.648–1.322)

1.009 (0.605–1.682)

0.906 (0.470–1.746)

Gestational hypertension

H

45.4

1.075 (0.687–1.682)

0.987 (0.580–1.680)

1.151 (0.570–2.321)

1.431 (0.518–3.952)

1.332 (0.363–4.882)

43.6

1.069 (0.705–1.620)

1.009 (0.619–1.643)

1.220 (0.646–2.304)

1.529 (0.618–3.783)

1.401 (0.446–4.401)

42.5

1.067 (0.713–1.595)

1.022 (0.64–1.633)

1.261 (0.69–2.305)

1.585 (0.678–3.704)

1.440 (0.499–4.161)

L

16.9

0.975 (0.856–1.111)

0.952 (0.819–1.107)

0.791 (0.649–0.965)

0.693 (0.519–0.924)

0.773 (0.537–1.114)

9.9

1.042 (0.817–1.329)

0.956 (0.720–1.270)

0.668 (0.458–0.975)

0.553 (0.320–0.956)

0.660 (0.329–1.325)

6.4

0.950 (0.724–1.246)

0.863 (0.638–1.168)

0.676 (0.459–0.997)

0.625 (0.356–1.098)

0.738 (0.358–1.521)

  1. a Physiological Equivalent Temperature (°C)
  2. b High PET values
  3. c Low PET values