Introduction: The third trimester of pregnancy is a period characterized by increased physiological changes that often cause physical discomfort, such as back pain, leg cramps, shortness of breath, and frequent urination. These conditions have the potential to disrupt the sleep quality of pregnant women, which in turn can impact the health of the mother and fetus. This study aims to analyze the relationship between physical discomfort and sleep quality in third-trimester pregnant women at the Kalijudan Community Health Center, Surabaya City. Methods: This study used a cross-sectional approach with a quantitative analytical design. A total of 41 respondents were selected from a total population of 45 third-trimester pregnant women who attended antenatal care visits through a purposive sampling technique. The independent variable was physical discomfort, and the dependent variable was sleep quality. Data were collected using a physical discomfort questionnaire and the Pittsburgh Sleep Quality Index (PSQI), then analyzed using Spearman test rho. Results: The results showed that most respondents (51.2%) experienced severe physical discomfort, and most respondents (63.4%) had poor sleep quality. Statistical tests showed that there was a significant relationship between physical discomfort and sleep quality of pregnant women in the third trimester with a p-value = 0.036 and a coefficient of rs = 0.329, indicating that the strength of the relationship between physical discomfort and sleep quality was in the weak category. Conclusions: These findings are expected to be the basis for the development of antenatal services, especially regarding early detection and treatment of physical discomfort as an effort to improve the sleep quality of pregnant women.
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