Factors associated with hypertensive disorders of pregnancy in sub-Saharan Africa: A systematic and meta-analysis

Influence of type of cooking fuel on risk of hypertension among reproductive-age women in sub-Saharan Africa: insights from nationally representative cross-sectional surveys

BACKGROUND

Nearly one-third of the world's population (2.4 billion people) rely on unclean cooking fuel sources. The study assessed the association of the type of cooking fuel and hypertension risk in sub-Saharan Africa (SSA).

METHODS

The study analysed pooled data from 97 942 individuals in the Demographic and Health Survey (DHS) between 2014 and 2021 in 10 SSA countries. Univariate, bivariate and multivariate analyses were performed, including basic descriptive statistics and binary logistic regression. The independent variable of interest was the type of cooking fuel, while hypertension served as the outcome variable.

RESULTS

Women using unclean cooking fuel were 1.21 times more likely to be hypertensive compared with those using clean cooking fuel (adjusted odds ratio [aOR] 1.21 [95% confidence interval {CI} 1.11 to 1.31]). Older age (aOR 5.78 [95% CI 5.04 to 6.62]), higher education (aOR 1.14 [95% CI 1.05 to 1.23]), being married (aOR 1.64 [95% CI 1.49 to 1.80]), working in sales and services occupations (aOR 1.34 [95% CI 1.24 to 1.44]), frequent health facility visits (aOR 1.59 [95% CI 1.51 to 1.68]), higher wealth index and exposure to media were significantly associated with hypertension risk.

CONCLUSIONS

Efforts to reduce reliance on unclean cooking fuel at both the household and population levels need to be intensified in SSA countries. Promoting the use of clean cooking technologies and fuels and implementing supportive policies for transitioning from unclean cooking fuels are crucial. Targeted interventions to reduce hypertension risk in SSA should focus on women using unclean cooking fuel, older women, individuals from wealthier households and those with higher education levels.

An observational study of pro- and anti-angiogenic factors in hypertensive disorders of pregnancy in women of African ancestry

Hypertensive disorders in pregnancy (HDPs) are the leading cause of maternal and perinatal deaths worldwide. Despite the widely reported multisystemic pathophysiology of pre-eclampsia and other HDPs, it is unknown whether these disorders represent a continuum or separate entities making clinical diagnosis a challenge. This study aimed to investigate angiogenic, metabolic and immunoregulatory specific profiles of hypertensive and gestationally matched normotensive pregnancies. A total of 200 pregnancies from a regional hospital in South Africa, via convenience sampling, were quantitatively analysed for circulating sFlt-1; PlGF; VEGF; sENG; PAPP-A; PP13; ADAMTS 12; TGF-β1 in maternal serum samples using ELISA technique. Serum protein markers TGF-β1, sENG and PAPP-A were significantly increased (p < .05) in early-onset pre-eclampsia vs. NG1 groups. sFlt-1 was significantly higher in late-onset pre-eclampsia vs NG2 groups. The GH group showed a significant increase in TGF-β1 and PAPP-A vs. NG1 counterpart. ADAMTS12 and sENG were significantly lower in gestational hypertension vs. early-onset pre-eclampsia. No significant differences were seen in PlGF, VEGF and PP13 levels across the groups. These changes show the HDP spectrum has distinct characteristics on the angiogenic profile. Based on these results, further validation of diagnostic and prognostic biomarkers of pre-eclampsia and gestational hypertension is warranted.Impact statementWhat is already known on this subject? Hypertensive pregnancy disorders are a public health problem with adverse effects on both mother and neonate. The elusive pathogenesis of this syndrome combined with the late prevalence of symptoms leaves clinicians with a myriad of theories and indefinite treatments. The investigation into conventional anti-/angiogenic factors has been extensively studied in pre-eclampsia patients only. The overlapping clinical presentation of pre-eclampsia and gestational hypertension further complicates the diagnosis of disorders.What do the results of this study add? The investigation of novel angiogenic, metabolic and inflammatory markers will firstly contribute to generating a database for researchers both nationally and internationally. This combinatory triad of markers will assist in elucidating and differentiating between early- and late-onset preeclampsia versus gestational hypertension. The results of our cohort study suggest possible early diagnostic markers for pre-eclampsia and gestational hypertension.What are the implications of these findings for clinical practice and/or further research? Research in this area will contribute to an improvement in early disease management which will ultimately lead to a reduction in health care costs and mortality rate locally and globally. It will also enforce diagnostic and prognostic markers for hypertensive pregnancy diseases and warrant further investigation into the proteins primarily involved in the trophoblastic invasion. This will then clarify whether these two closely related hypertensive disorders represent a continuum or two separate entities.

Determinants of Pregnancy-Induced Hypertension among Mothers Attending Public Hospitals in Wolaita Zone, South Ethiopia: Findings from Unmatched Case-Control Study

Background

It has been estimated that approximately 14% of maternal death has resulted due to pregnancy-induced hypertension. Evidence also suggests that pregnancy-induced hypertension may result in adverse maternal and child outcomes. The aim of this study was to assess the determinants of pregnancy-induced hypertension among mothers attending antenatal and delivery services at public health hospitals in Wolaita zone, southern Ethiopia.

Methods

An institutionally based unmatched case-control study was conducted at three public hospitals. A total of 283 study participants were recruited for this study. Cases were selected consecutively as they were being diagnosed for pregnancy-induced hypertension, and two controls were selected for each case. Data were collected via the face-to-face interview technique using a pretested questionnaire. Unconditional logistic regression analysis was used to identify the independent predictor variables and produced odds ratio (OR) as a measure of association.

Results

The mean ± (SD) ages of cases and controls were 26.1 ± 5.4 and 26.1 ± 4.5 years, respectively. Being rural residents (AOR: 2.25, 95% CI: 1.09-4.65), illiterate (AOR: 3.12, 95% CI: 1.20-8.08), having the history of pregnancy-induced hypertension (AOR: 6.62, 95% CI: 2.48-17.71), history of kidney disease (AOR: 3.14, 95% CI: 1.05-9.38), and family history of hypertension (AOR: 5.59, 95% CI: 2.73-11.45) were determinants that increased the odds of suffering from hypertensive disorders of pregnancy. More importantly, eating vegetables and fruit reduces the odds of suffering from pregnancy-induced hypertension by 77% (AOR: 0.23, 95% CI: 0.06-0.79).

Conclusion

Being rural residents, illiterate, having a history of pregnancy-induced hypertension, and history of kidney disease, as well as the family history of hypertension were identified determinates of hypertensive disorders of pregnancy in the study area. Furthermore, fruit and vegetable intakes were identified as protective factors for pregnancy-induced hypertension. Therefore, early diagnosis and intervention of this disorder are warranted to reduce adverse outcomes.

Nonproteinuric Preeclampsia among Women with Hypertensive Disorders of Pregnancy at a Referral Hospital in Southwestern Uganda

Background

Preeclampsia is a priority obstetric emergency requiring urgent diagnosis and treatment to avert poor pregnancy outcomes. Nonproteinuric preeclampsia poses even greater diagnostic challenges due to contested diagnostic criteria by the clinical practice guidelines and variable clinical presentation. Previously, preeclampsia was only diagnosed if high blood pressure and proteinuria were present. This study determined the prevalence of nonproteinuric preeclampsia and associated factors among women admitted with hypertensive disorders of pregnancy at a referral hospital in southwestern Uganda.

Methods

Women with hypertensive disorders of pregnancy were consecutively enrolled in a cross-sectional study at Mbarara Regional Referral Hospital between November 2019 and May 2020. We interviewed all pregnant women ≥20 gestation weeks presenting with hypertension and obtained their sociodemographic, medical, and obstetric characteristics. We excluded women with chronic hypertension. We measured bedside dipstick proteinuria in clean-catch urine. Preeclampsia was defined as hypertension plus any feature of severity including <100,000 platelets/ul, creatinine >1.1 g/dl, and liver transaminases ≥twice upper normal limit with or without proteinuria. We defined nonproteinuric preeclampsia in participants with <+2 urine dipstick cut-off and determined the factors associated with nonproteinuric preeclampsia using logistic regression.

Results

We enrolled 134 participants. The mean age was 26.9 (SD ± 7.1) years and 51.5% were primigravid. The prevalence of nonproteinuric preeclampsia was 24.6% (95% CI: 17.9–32.7). Primigravidity (aOR 2.70 95% CI: 1.09–6.72, p = 0.032) was the factor independently associated with nonproteinuric preeclampsia.

Conclusion

Nonproteinuric preeclampsia was common, especially among primigravidae. We recommend increased surveillance for nonproteinuric preeclampsia, especially among first-time pregnant women, who may not be detected by the traditional criteria. Obstetrics care providers should emphasize laboratory testing beyond proteinuria, among all women with hypertensive disorders of pregnancy to optimally diagnose and manage nonproteinuric preeclampsia.

Prevalence of hypertension in pregnancy and its associated factors among women attending antenatal clinics in Bengaluru

BACKGROUND

Hypertension in pregnancy is a major challenge in antenatal practice due to its impact on obstetric and foetal outcomes.

OBJECTIVE

To assess the prevalence of hypertension during pregnancy and its associated risk factors among pregnant women availing of antenatal care at public sector hospitals in Bengaluru, Southern India.

METHODS

The sample frame included pregnant women who were attending the antenatal clinic at three public sector hospitals. The data were analyzed for 783 pregnant women who had completed their baseline visit over a period of 18 months (September 2017 to March 2019). The blood pressure was categorized based on the American College of Cardiology/American Heart Association 2017 guidelines.

RESULTS

Out of the 783 respondents who were examined, 13.9% were found to be hypertensive. The adjusted Odd's ratio was significantly higher for those who were employed outside the house and obese respondents. Other factors such as higher maternal age, lower socioeconomic status, pregnancy-related anxiety, prenatal depression, nulliparity appeared to increase the risk.

CONCLUSION

Hypertension during pregnancy continues to be a matter of concern. Risk factor profiling of pregnant women is of utmost importance to identify those who may be likely to develop hypertensive disorders during pregnancy.