Table 4. Association between temperature and early and late preeclampsia, stratified by ethnicity and “warm”/”cold” pregnancies; multivariable regression models.

Bedouin-Arab ethnicity

Jewish ethnicity

a. Early PE

"Cold" Pregnancies

"Warm" Pregnancies

"Cold" Pregnancies

"Warm" Pregnancies

Variable

PV

RR

CI

PV

RR

CI

PV

RR

CI

PV

RR

CI

Temperature trimester 1

<0.001

0.06

0.02–0.18

<0.001

436.7

89–2139

<0.001

0.08

0.03–0.27

<0.001

111.45

27.6–450

Temperature trimester 2

0.27

0.67

0.32–1.4

0.01

0.2

0.06–0.69

0.59

1.2

0.57–2.7

0.003

0.18

0.06–0.55

Temperature trimester 3

<0.001

0.06

0.02–0.17

<0.001

155.2

42–569

0.001

0.12

0.03–0.39

<0.001

24.2

7.7–76

b. Late PE

Variable

PV

RR

CI

PV

RR

CI

PV

RR

CI

PV

RR

CI

Temperature trimester 1

0.58

0.91

0.64–1.29

0.02

1.62

1.08–2.45

0.19

1.03

0.88–1.98

0.27

1.33

0.8–2.2

Temperature trimester 2

0.59

0.94

0.74–1.18

0.95

0.99

0.7–1.4

0.15

1.02

0.93–1.57

0.23

1.3

0.85–1.98

Temperature trimester 3

0.31

0.82

0.57–1.2

0.02

1.48

1.07–2.04

0.65

1.01

0.72–1.7

0.12

1.38

0.92–2.03

Results of the GEE Poisson multivariable regression models, with early and late preeclampsia as an outcome. The models included averaged temperatures for each trimester in IQR units as the primary exposure at study and were adjusted to maternal age, gravidity, multiple delivery and a history of preeclampsia in the past deliveries. Results are presented by the relative risks (RR), their 95% confidence intervals (CI) and p-values.