Association of seasonality with hypertension in pregnancy: a systematic review

TePoel, Megan; Saftlas, Audrey F.; Wallis, Anne

doi:10.1016/j.jri.2011.01.020

Cited by 47 publications

(45 citation statements)

References 35 publications

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“…5,6 Although these remain controversial, recent systematic review on the subject found mostly consistent evidence of seasonal variation in the occurrence of the hypertensive disorders of pregnancy in both tropical and non-tropical regions. 7 The aim of the present study was to evaluate the presence of an association between environmental temperature and the relative humidity of the air and the frequency of hypertensive disorders of pregnancy in a maternity teaching hospital in Recife, northeastern Brazil. were included.…”

Section: Introductionmentioning

confidence: 99%

Hypertension, pregnancy and weather: is seasonality involved?

Melo

Amorim

Katz

et al. 2014

Rev. Assoc. Med. Bras.

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Conflict of interest: noneObjective: The present study aimed at assessing the association between environmental temperature and the relative humidity of the air with frequency of hypertensive disorders of pregnancy. Methods: A prospective and retrospective, descriptive, ecological study was held at a teaching maternity in Recife, Brazil. Data from all 26.125 pregnant women admitted between 2000 and 2006 were analysed and 5.051 had the diagnosis of hypertensive disorder of pregnancy. The incidence percentages were calculated monthly per deliveries. Data on mean monthly temperature and relative humidity of the air were collected and monthly comparisons were conducted. February was chosen as the reference month due to its lowest incidence of the disease. The relative chance of hypertensive disorders of pregnancy for each other month was estimated by odds ratio and Pearson's correlation coefficient was used to calculate the relation between the incidence of hypertensive disorders of pregnancy and the mean monthly temperature and relative air humidity. Results: February presented the lowest mean monthly incidence (9.95%) and August the highest (21.54%). Pearson correlation coefficient revealed a higher incidence of hypertensive disorders of pregnancy in the cooler months (r= -0.26; p=0.046) and no significant effect of relative air humidity (r=0.20; p=0.128). Conclusion:The incidence of hypertensive disorders of pregnancy may be affected by variations in temperature, increasing during cooler periods.

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Section: Introductionmentioning

confidence: 99%

Hypertension, pregnancy and weather: is seasonality involved?

Melo

Amorim

Katz

et al. 2014

Rev. Assoc. Med. Bras.

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show abstract

“…Hypertensive disorders of pregnancy were associated with winter delivery in a systematic review of the literature (TePoel et al, 2011). Low birth weight has been associated with low temperatures in the first (Chodick et al, 2007), second (Elter et al, 2004;Murray et al, 2000), and third trimesters (Chodick et al, 2007;Lawlor et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Extreme winter temperature and birth defects: A population-based case-control study

Zutphen

Hsu

Lin

2014

Environmental Research

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“…14 As studies have shown that VDD may be a risk factor for preeclampsia and that vitamin D supplements above the dose recommended in prenatal vitamin in early pregnancy could play a role in prevention of preeclampsia, this study was planned to find out the association of Vitamin D and preeclampsia.…”

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confidence: 99%