The Fear Avoidance Beliefs Questionnaire (FABQ) was developed to investigate fear-avoidance beliefs among low back pain patients. It consists of two subscales - the Physical Activity subscale and the Work subscale. Scoring involves summing the responses on specific items for each subscale, with higher scores indicating stronger fear-avoidance beliefs. The FABQ has been shown to be valid and reliable in identifying patients who are less likely to return to work or physical activities due to their back pain beliefs.