Road Safety & Maternal Health

Correct Seatbelt Positioning for Pregnant Car Occupants

Abstract and Background

Motor vehicle collisions remain a leading cause of traumatic injury during pregnancy worldwide. In Malaysia, where car travel is the second most common mode of transportation accounting for approximately 40% of daily commutes, the safety of pregnant occupants is a matter of significant public health concern. Despite legislative mandates requiring seatbelt use, pregnant women in Malaysia have historically been exempt from this requirement under certain conditions, potentially contributing to confusion about proper restraint practices during pregnancy.

This study, published in the Malaysian Journal of Public Health Medicine in 2018, investigated seatbelt wearing behaviour and the correctness of seatbelt positioning among pregnant car occupants in the Klang Valley, one of Malaysia’s most densely populated urban corridors encompassing areas such as Petaling Jaya, Klang, Gombak, and Hulu Langat. The researchers employed a face-to-face interview survey design to collect data from 503 pregnant women visiting pregnancy clinics for routine monthly check-ups, providing a robust sample size for examining this understudied aspect of maternal road safety.

Study Design and Methodology

The research team conducted a cross-sectional survey using a structured interview methodology. A total of 503 pregnant car occupants were recruited from pregnancy clinics across the Klang Valley between 2014 and the study publication date. The sampling strategy targeted women attending routine prenatal appointments, ensuring a representative cross-section of pregnant car occupants from diverse sociodemographic backgrounds. Sample size calculations were performed using appropriate statistical software to ensure adequate power for detecting meaningful differences in seatbelt use patterns.

The questionnaire gathered data on sociodemographic characteristics, driving or passenger status, seatbelt wearing frequency, and the specific positioning of both the lap and shoulder components of the three-point seatbelt system. Correct seatbelt positioning during pregnancy, as recommended by obstetric and road safety experts, requires the lap belt to be positioned low across the hips (below the pregnant abdomen) and the shoulder belt to pass between the breasts and to the side of the abdomen. The researchers assessed each respondent’s reported positioning against these guidelines to determine the rate of correct usage.

Key Results

Overall Seatbelt Wearing Rate

The study found encouragingly high overall seatbelt wearing rates among pregnant front-seat occupants, with 90% of pregnant drivers and 85% of pregnant front passengers reporting consistent seatbelt use. These rates compare favourably with general population seatbelt compliance in Malaysia, suggesting that pregnancy does not substantially reduce the propensity to wear seatbelts, at least among front-seat occupants.

Correct Positioning

However, the critical finding was the striking gap between wearing a seatbelt and wearing it correctly. Only 29% of all respondents demonstrated correct seatbelt positioning as defined by expert guidelines. When examining the lap belt component specifically, only 26.6% of pregnant passengers positioned it correctly across the hips. The majority placed the lap belt either directly across the abdomen or flat across the upper thighs, both of which are considered incorrect and potentially dangerous positions that could increase the risk of placental abruption, uterine rupture, or direct fetal injury in a collision.

Sociodemographic Distribution

The survey captured respondents from across the sociodemographic spectrum of the Klang Valley. Analysis of the sociodemographic data indicated that factors such as educational level, parity, and gestational age may influence both the tendency to wear seatbelts and the likelihood of correct positioning, though the complex interplay of these factors requires further investigation.

Comparison with International Evidence

The findings from this Malaysian study align with concerning international trends. Research conducted across multiple countries involving 1,931 pregnant women found that globally, while seatbelt use during pregnancy is generally high at approximately 91.9%, the rate of correct overall positioning is extremely low at only 4.3%. In that international survey, 40.8% positioned the shoulder belt correctly but only 13.2% wore the lap section correctly across the hips. Three out of four women positioned their lap section either across the abdomen or flat across the upper thighs, both of which are potentially hazardous positions.

An Australian study of 1,491 pregnant vehicle drivers found that while nearly all participants (99.1%) wore seatbelts, only 41.4% used correct positioning. Notably, the Australian study also found that women who received specific information about seatbelt use during pregnancy were significantly more likely to position their seatbelts correctly (56.8% versus 39.3%), suggesting that targeted education could meaningfully improve outcomes.

Clinical and Public Health Implications

Automobile collisions represent the largest cause of accidental death and placental abruption during pregnancy. Correctly worn three-point seatbelts are critical restraint systems for the safety of both the foetus and the pregnant woman. The shoulder and lap portions of the seatbelt work as an integrated system, and both must be positioned simultaneously according to guidelines for the restraint to function as designed during a collision.

In Malaysia, seatbelt laws were strengthened in 2009 to mandate seatbelt use for all vehicle occupants including rear-seat passengers, with penalties of up to RM 2,000 or imprisonment for non-compliance. However, pregnant mothers and individuals with certain medical conditions are currently exempt from the requirement. This exemption, while well-intentioned, may inadvertently contribute to the misconception that seatbelts are unnecessary or even harmful during pregnancy.

The study’s findings underscore the need for targeted educational interventions delivered through antenatal care settings, where pregnant women are already engaged with healthcare providers. The researchers recommend that the media, medical community, and automotive industry collaborate to provide targeted information about correct seatbelt use during pregnancy. Healthcare providers, particularly obstetricians, midwives, and nurses, are positioned to play a pivotal role in awareness campaigns.

Recommendations for Correct Seatbelt Use During Pregnancy

Based on guidelines from the National Highway Traffic Safety Administration and obstetric experts, the recommended seatbelt positioning during pregnancy involves placing the lap belt low across the hips, below the pregnant abdomen and not over it. The shoulder belt should pass between the breasts and to the side of the abdomen. The belt should never be placed behind the back or under the arm. Pregnant women should maintain at least 25 centimetres of distance between their body and the steering wheel, and the seat position should be adjusted as the pregnancy progresses to maintain both comfort and safety.

Limitations

This study has several limitations that should be acknowledged. The cross-sectional design limits causal inference. Self-reported seatbelt positioning may be subject to social desirability bias, potentially overstating correct usage rates. The study was confined to the Klang Valley, which may not be representative of rural areas where driving patterns and healthcare access differ. Additionally, the study relied on clinic-based recruitment, which may have excluded pregnant women who do not attend regular antenatal care and who may represent a higher-risk population.

Significance for Malaysian Public Health

This research makes an important contribution to the limited body of evidence on seatbelt behaviour among pregnant occupants in Southeast Asia. The large gap between seatbelt wearing rates and correct positioning rates highlights a significant and addressable public health risk. With road traffic injuries remaining a leading cause of morbidity and mortality in Malaysia, ensuring that pregnant women, who represent a particularly vulnerable population, are properly restrained during vehicle travel should be a priority for road safety and maternal health programmes alike.

← Back to MJPHM Homepage