Objective      To analyze the risk factors of low back pain in fighter pilots.       Methods      Fighter pilots were investigated using questionnaires designed to collect data including general conditions

life styles and flying styles. The subjects with daily low back pain constituted the case group

and those without daily low back pain served as the control group. The data were analyzed by logistic regression analysis.       Results      Data of 429 pilots were qualified and further analyzed. The prevalence of daily low back pain was 35.7% (153 cases). Of all the latent risk factors of low back pain in the logistic regression model

in-fly lumbar distortion in coronal plane was the most relevant factor (OR=8.031)

followed by long-range fly time (OR=7.245)

uneasy static posture (OR=5.519)

in-fly lumbar distortion in sagittal plane (OR=3.365)

lack of lumbar safeguard against high force loads (OR=1.937) and improper measures against annoyance (OR=1.891).       Conclusion      The prevalence of daily low back pain in the fighter pilots is relatively high. The postural static loads on the low back during flight may be important risk factor of daily low back pain in the fighter pilots.