Leg length discrepancy (LLD) is a condition in which lower extremities have a diff erent length. The discrepancy can cause functional dysfunction and health problem. Low back pain (LBP) is one of a health problem associated with LLD. The prevalence of LBP in young people increases over time. This study aimed to evaluate the association between LLD and LBP in college students. This cross-sectional study involved 75 (40 female) students of Faculty of Medicine, Atma Jaya. Height, weight, and BMI were measured and calculated. True leg length was measured three times using tape measurement in the supine position. The LLD was defi ned as the diff erence of 10 mm or more. Numeric data between LLD vs no LLD were compared using independent samples of the t-test. The association between LLD, LBP, and other variables were evaluated using chi-square. A p-value <0.05 was set as statistically signifi cant. Statistics analysis was computed using SPSS (ver. 17). Leg length discrepancy and LBP were found in 31 (22 female) and 36 (22 female), respectively. Among those with LBP, 16 were LLD (44.4%). No association was found between LBP and LLD (p=0.548), BMI (p=0.518), and gender (p=0.164). Gender was associated with LLD (OR 3.53, 95%CI 1.32 -9.42, p=0.010). Only 5 (13.9%) of aff ected LBP experienced dysfunctional state. There is no relationship between LLD, gender, BMI and LBP in students of the Faculty of Medicine. Female have a higher risk of LLD.

Low back pain (LBP) has long been recognized as a major health problem. The increasing prevalence of LBP has a negative impact on quality of life, and sosioekonomi. 1 Low back pain in Indonesia often found in the age group of 40 years. The prevalence of low back pain in young people increases with age. When entering the working life can be one risk factor muskulosceletal disorder. 2 Low back pain identified as pain that occurs in the lumbosacral spine and surrounding muscle layers accompanied with or without pain feet. 3 Leg length inquality (LLI) or Leg Length Discrepancy (LLD) is a condition in which both lower limbs are not equal long. 4 A study reports that there are 70% of the normal adult population who show LLD minor, 5 and other studies show that 93% of school children have LLD. 6 LLD is more than 10mm can cause biomechanical disorders such as scoliosis, joint pain back and lower extremities, pelvic tilt, abnormal gait and degenerative joint disease that prematur. 7 Inequalities that occur limb length can cause dysfunction and pain, including low back pain. MethodThis study is an observational study (non experimental) by means of data capture cross -sectional and how conclusions descriptively and analytically. The independent variable is the leg length discrepancy and the dependent variable is low back pain. The study was conducted in January and July in the academic year 2017-2018 Faculty of Medicine, University of Atma Jaya.