Introduction
Prior studies on hypertensive disorders in pregnancy (HDP) suggest that it poses the greatest impact on maternal mortality and complicates almost a tenth of all pregnancies globally [32,37,38]. Additionally, HDP is reported to be the second leading cause of direct maternal death and directly accounts for over 70,000 cases of maternal mortality globally [31]. In furtherance, preliminary studies indicate that perinatal women display poor knowledge and misperceptions about PIH despite its significance for prompt identification and management challenges (Osungbade et al., 2011). However, preliminary reports [ 36] suggest that despite the challenges, a substantial number of deaths related to pregnancy-induced hypertension could be averted by evidence-based, effective, and timely interventions by increasing women’s knowledge and changing attitudes towards the condition.
Hypertensive Disorders in Pregnancy (HDP): Epidemiology
Hypertension is the leading contributor to the global burden of disease, with about 1 billion adults affected worldwide and 9 million associated deaths annually. [15,37,38]. Hypertensive disorders in pregnancy (HDP) are also a major threat to global health [20]. They complicate 5.2%‐8.2% of pregnancies globally [34] and are associated with an increased risk of adverse foetal, neonatal, and maternal outcomes including premature delivery, foetal growth restriction, intra‐uterine death, renal or hepatic failure, haemorrhage, and stroke (Duley L, 2009). Likewise, some reports [33] have observed that women with HDP have an increased lifetime risk of cardiovascular disease.
Although there is a lack of consistency in its definition, HDP refers to a spectrum of conditions of vascular origin and systemic manifestations caused by a mixture of genetic and acquired factors, which occur during pregnancy [4,15]. Pressure Education Program Working Group on High Blood Pressure in Pregnancy classified HDP into four entities: chronic hypertension, preeclampsia‐eclampsia, preeclampsia superimposed on chronic hypertension, and gestational hypertension [39], with the American College of Obstetricians and Gynaecologists (2018) suggesting that this widely used classification considers the time of appearance of the condition in relation to pregnancy. Whiles chronic hypertension occurs in women who have high blood pressure (over 140/90) before pregnancy or in early in pregnancy (before 20 weeks) and continue to experience its manifestations after delivery, gestational hypertension specifically refers to high blood pressure that develops after the 20th week in pregnancy and goes away after delivery or childbirth. Similarly, both chronic hypertension and gestational hypertension can lead to pre-eclampsia and eclampsia after the 20th week of pregnancy. Symptoms include high blood pressure and protein in the urine. This can lead to serious complications for both mom and baby if not treated quickly [24,30].
Pregnancy induced hypertension (PIH) is defined as BP ≥ 140/90 mmHg taken after a period of rest on two occasions or ≥160/110 mmHg on one occasion in a previously normotensive woman [29]. Pregnancy-induced hypertension affects 5-7 % of all pregnancies. It is broadly defined by hypertension and proteinuria, and this includes pre-eclampsia and eclampsia with the presence of convulsions not attributable to other neurologic diseases [30].
Globally, 10 % of all pregnancies are complicated by hypertension, with pre-eclampsia and eclampsia being the major causes of maternal and prenatal morbidity and mortality [26]. It is also estimated that pregnancy induced hypertension (PIH), one of the hypertensive disorders of pregnancy, affects about 5% – 8 % of all pregnant women worldwide (Arshad et al., 2019). Studies conducted within the sub-African region report the prevalence of PIH to be around 33% of all pregnancies, whiles in Ghana it is reported to be between 45% to 50% [2,7].
Knowledge of pregnant women on Hypertensive Disorders in Pregnancy and its related complications
Preliminary studies have shown that women younger than 20 years as well as those older than 40 yers are mostly at risk of HDP. The studies further identify women with first pregnancy and those with pre-existing hypertension to be highly vulnerable to the development of HDP [15,18].
However, health education during antenatal care attendance may play an important role in preventing the disease from aggravating [1,3,4]. The World Health Organization report, 2011 shows that high blood pressure levels are more effectively controlled through enhancing the pregnant mothers’ self-awareness and knowledge. Nonetheless, most perinatal women have inadequate knowledge about HDP which hinders their ability to seek prompt medical attention. Studies across the sub-African region have demonstrated a deficit in knowledge among pregnant women on HDP. For instance, findings from a qualitative study in women in South Africa showed that pregnant women with Pregnancy Induced Hypertension had inadequate knowledge on signs and symptoms, management, and the prevention of complications as well as how it impacts the unborn baby [22]. Similarly, another study revealed a deficit in knowledge among pregnant Moroccan women residing in Morocco and the Netherlands on HDP and further reports that more than 50% of the women had no knowledge at all even though they acknowledged that HDP and its complications were dangerous [25].
Since HDP and its associated complications poses a serious threat to pregnant women and their unborn babies, it is prudent for pregnant women to be sensitized and encouraged to regularly attend antenatal clinics for early identification and prompt treatment of the condition.
Attitudes and practices of pregnant women towards hypertensive disorders in pregnancy
Reports from several studies conducted globally suggest that there is a significant gap among pregnant women related to knowledge, attitude, and perception towards pregnancy-induced hypertension [11,12] which directly or indirectly influence health seeking-behaviours leading to increased maternal mortality and morbidity [12]. These studies further identify lack of knowledge to be the predisposing factor to practice risky behaviours for pregnancy-induced hypertension as well as other hypertensive disorders in pregnancy whiles poor understanding of the disease leads to anxiety and becomes a source of worry to the family as well. Despite the above, ample evidence exist that suggest a positive correlation between higher educational status and attitude formation towards PIH among pregnant women [7]. For instance, some reports [ 12,13] indicate that pregnant women with basic education usually manifest positive attitude, evidenced by their punctuality and regularity to antenatal care clinics and promptly seeking medical attention for any perceived manifestation of PIH. Several other factors such as diet, smoking, the consumption of alcohol as well as stress during pregnancy have been identified as predisposing factors to PIH. [11]. Fadare et al. (2016) explored the knowledge and attitudes of pregnant women towards the management of pregnancy induced hypertension in Nigeria and narrates that a substantial number of participants (about 80 %) believed that PIH is preventable and would seek medical attention at the hospital should they experience and signs of PIH whiles about 20% of the participants were of the believe that traditional medicine is more effective and therefore they would prefer the later to the former.
Similarly, Zuo, et al (2016) have highlighted that stress management is essential for the treatment of HDP and further adds that pregnancy in its natural sense could be a significant stressor [14]. Nonetheless, there are no established protocols at antenatal clinics to counsel pregnant women on how to properly manage stress during pregnancy.
Consequences of Hypertensive Disorders in Pregnancy on Birth Outcomes
Hypertensive disorders of pregnancy (HDP) are multisystem diseases, which include chronic hypertension (pre-existing), gestational hypertension, preeclampsia, eclampsia, and superimposed preeclampsia on chronic hypertension [23]. Hypertensive disorders of pregnancy (HDP) increase adverse perinatal outcomes in women with the disorder. Whiles 16% of the estimated 2.6 million still births are attributable to HDP globally, 10% of early neonatal deaths are accounted for by the condition [20]. Previous studies reveal that HDP complicates about 6% of all pregnancies and further adds that women with hypertensive disorder of pregnancy of any form were at higher risk of adverse perinatal outcomes compared to their normotensive counterparts [6,19]. Again, Berhan (2014) reports that HDP is associated with disturbed vascular manifestations, oxidative stress, and endothelial damage. This affects placental function resulting in poorer perfusion and nutrient supplementation to the foetus that enhance adverse perinatal outcomes [8].
One study found that 1 in 4 (about 37%) of all pregnancies complicated by hypertensive disorders end up in perinatal death and new-born with low birth weight [5,16]. Consistent with this is another report that suggests that Sub-Saharan (SSA) Africa accounted for the highest Maternal Mortality Ratio (MMR) in Africa, with 546 deaths/100,000 live births in 2015 compared to any other region in the world [16]. The report further states that MMR for SSA represented 65% of all maternal deaths in the developing world. However, in Ghana, there was a steady reduction in the MMR and Infant Mortality Ratio (IMR) from 740 to 319/100,000 live births and 80 to 41 infant deaths/ 1000 live births, respectively, between 1990 and 2015 [17]. In furtherance, recent reports [18] on Obstetrical intervention rates and maternal and neonatal outcomes of women with gestational hypertension revealed that, women with PIH had obstetrical intervention rates much higher than normotensive ones. The obstetrical interventions here were the induction and Caesarean delivery rates, with an increased rate of caesarean section among severe preeclamptic women.
Impact of Hypertensive Disorders in Pregnancy on Maternal Mental Health
Existing evidence regarding the relationship between hypertensive disorders of pregnancy (HDP) and the risk of maternal mental illness is inconclusive [9]. Preliminary studies have sought to investigate whether HDP are associated with depressive and anxiety symptoms during pregnancy and reports indicate that mothers with pre-eclampsia had a 53% increased risk of antenatal depressive symptoms compared with those without pre-eclampsia [9, 19]. It further adds that having pre-eclampsia and being a nulliparous woman resulted in the highest risk of antenatal depressive symptoms. It is imperative that perinatal women attending antenatal services be routinely screened for anxiety and depressive symptoms and provided with interventions when indicated.