The relationship between muscle mass and low back pain: a cross-sectional study

Area of Science:

• Musculoskeletal health
• Epidemiology
• Biostatistics

Background:

• Low back pain is a prevalent condition with multifactorial causes.
• Body composition, specifically muscle mass, may play a role in low back pain development.
• Appendicular Skeletal Muscle Mass/body mass index (ASM/BMI) is a metric reflecting muscle mass relative to body size.

Purpose of the Study:

• To investigate the relationship between ASM/BMI and the prevalence of low back pain.
• To identify specific demographic groups where this relationship is more pronounced.

Main Methods:

• Analysis of data from the National Health and Nutrition Examination Survey (NHANES 1999-2004).
• Inclusion of 11,738 participants.
• Utilization of multiple logistic regression modeling to assess the association between ASM/BMI quartiles and low back pain.

Main Results:

• Participants in the highest quartile of ASM/BMI (Q4) showed a significantly lower risk of low back pain compared to the lowest quartile (Q1).
• No significant differences in low back pain risk were found between Q2/Q3 and Q1.
• Subgroup analyses indicated a more pronounced protective effect of elevated ASM/BMI in women and individuals aged 40-59 years.

Conclusions:

• A negative correlation exists between ASM/BMI and low back pain.
• Elevated ASM/BMI may serve as a protective factor against low back pain, particularly in women and middle-aged adults.
• Clinical assessment of ASM/BMI could aid in risk stratification for low back pain in specific populations.