Comparison of Fixed and Age-Sex-Adjusted NFPA Standards for Cardiopulmonary Fitness in Thai Wildland Firefighters.

OBJECTIVE

This study examined Thai wildland firefighters' cardiopulmonary fitness, comparing previous and updated NFPA criteria.

METHODS

Chiang Mai wildland firefighters' health was cross-sectionally examined. Chester Step cardiopulmonary fitness was assessed using the fixed 12-MET threshold and age- and sex-adjusted 50th percentile criterion. McNemar test indicated standard concordance, and multivariable linear regression found MET values. Statistical significance was assigned by p-values < 0.05.

RESULTS

Significant differences in fitness classifications between two methods (p < 0.05). Two previously passed participants failed, while 13 previously failed participants passed. Age (B=-0.07; 95% CI: -0.13, -0.01; p=0.016) and resting heart rate (B=-0.11; 95% CI: -0.16, -0.07; p<0.001) strongly correlated with METs.

CONCLUSION

The age- and sex-adjusted 50th percentile criteria requirements allow for better cardiovascular fitness and practical work duties. Updates in standards are beneficial for firefighters' safety and health monitoring.