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This study aims to better understand advanced maternal age (AMA) and its impact on maternal and perinatal health by investigating the prevalence, sociodemographic profiles and adverse pregnancy outcomes of AMA in Abu Dhabi, UAE.

This study is a part of a large multicenter cross-sectional study. The project aimed to improve maternal and early child health in Abu Dhabi, UAE. It was conducted at seven healthcare centers located in the urban, suburban and rural areas of Abu Dhabi. The project’s data included all mothers (i.e. Emirati and non-Emirati mothers) who came to the centers looking for healthcare follow-up.

From the total of 1,710 enrolled mothers with complete data, 379 were with AMA, having a prevalence of 22.2% (95% confidence interval [CI] = 20.2, 24.2). Among 379 advanced maternal age (AMA) mothers, 328(84.5%), and 51(15.5) mothers were between 35 and 39 years, and =40 years, respectively. The mean (SD) of maternal age was 30.0(5.2) years. No significant association was found between AMA, and parent’s education, family income, child gender, preterm birth and low birth weight. In multivariable logistic regression analysis, factors significantly associated with AMA were higher parity (adjusted odd ratio [AOR] = 2.24, 95%CI = 2.00, 2.50), p-value < 0.001, non-Arab mothers (AOR = 2.44, 95%CI = 1.83, 3.24), p-value < 0.001, maternal employment (AOR = 1.37, 95%CI = 1.05, 1.77), p-value = 0.019, and cesarean delivery (AOR = 2.44, 95% CI = 1.83, 3.24), p-value = 0.011, pre-pregnancy maternal overweight (AOR = 1.49, 95%CI = 1.12, 1.98), p-value = 0,006, and pre-pregnancy maternal obesity (AOR = 2.15, 95%CI = 1.35, 3.44), p-value = 0.001.

First, unlike other studies, not all obstetrical outcomes (e.g. maternal and perinatal mortality and morbidity) were included as the current study data were part of a large project, and such limitations are expected; second, only quantitative method was used in the present study, it is clear from the literature AMA is a dilemma. Therefore, a qualitative study and mixed methods (both quantitative and qualitative) will provide a better explanation for such an understudied topic. Therefore, further research is recommended to overcome the abovementioned limitations aiming to explore the complexity of AMA, including studying its social determinants. Furthermore, it is worth emphasizing that future research involves more concerned parties, including health, culture and planning authorities, to better understand AMA issues.

The study provided valuable information regarding AMA issues in the UAE. Such information is of paramount importance to all involved parties, including policymakers, to take action regarding improving the health of mothers with advanced ages. Specific actions can be taken through thorough counseling of all expectant mothers with advanced ages before pregnancy, throughout pregnancy and delivery and beyond, by dealing with existing medical conditions and highlighting possible risks of AMA on pregnancy outcomes and how to overcome them in advance. In addition, further research is recommended to explore the social determinants of AMA.

Interior workspace environments use exclusively artificial light, resulting in a loss of biological connection and natural light quality, as well as greater energy consumption. The purpose of the study is to identify a suitable system that can provide natural light to such interior spaces throughout the day while supplementing it with artificial light when necessary. The fundamental aim is to provide insights into the most effective solutions for energy-efficient lighting design in the UAE's environment, with the potential to lower energy consumption related to interior lighting.

The study adopted an empirical approach to gather and analyze primary data based on field measurements to understand and assess existing lighting conditions, as well as DIALux lighting simulation software to test the efficacy of the proposed HLS in terms of natural light delivery, illumination quality and energy consumption. A branch of a local bank in the United Arab Emirates, situated inside one of the shopping malls where there is no natural light penetration, has been chosen as a case study.

The findings of comparing the base case to four probable scenarios that used HLS revealed that the third scenario, which uses 100% pure sunshine and 35% artificial LED light during daylight operations and 100% LED light during night duty, is considered to be optimal in terms of illumination quality and energy efficiency.

The study demonstrated the potential of innovative lighting to improve the visual working environment in interior spaces with limited access to direct natural lighting, especially in arid regions, where sunlight is plentiful throughout the year. The study contributes new insights into the establishment of lighting-related recommendations and standards for the UAE context. This may include advice for sustainable construction practices, lighting guidelines or incentives to encourage the use of hybrid lighting technology in commercial and institutional buildings.