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Aim of the study. To ascertain the correlation between lower back pain (LBP) and changes found in the magnetic resonance imaging (MRI) of a hospitalised sample group. Objectives. 1. To determine which changes - capable of causing pain syndromes - found in the lower back region during the MRI scan were the most frequent within the sample. 2. To find the level most vulnerable to the changes which are capable of causing LBP. 3. To find changes, discovered through MRI linked to LBP, and their numbers, as well as type of dependence categorised by age, gender and duration of pain. 4. To determine if there is a significant NRS dependence on the number of pain causing changes found through MRI. 5. To determine which changes in the lower back found through MRI cause the highest levels of pain. Methods. A retrospective analysis of the medical records of 91 patients with LBP, who during the year of 2016 were investigated and treated in Hospital of Lithuanian University of Health Sciences, was performed. From the medical records the following data was collected: the age, sex, duration of pain, pain intensity and MRI images, description and conclusions. Statistical analysis was performed using software program SPSS 20.0 (Statistical Package for Social Science). P value less than 0.05 was considered to be statistically significant. Results. Changes capable of causing LBP in the investigated spinal structures were found to have a median value of 13. Most commonly found MRI changes were degenerating changes (>50 proc.). Most changes set at a L4/L5 level, median 2 (min 0 - max 7) (p