16 October 2022
: Case report 
Physiologic Response to Exercise or Rhabdomyolysis? Creatine Phosphokinase Elevation in 16 Asymptomatic Firefighters
Unusual clinical course, Challenging differential diagnosis
Rajia Arbab12ABCDEF*, Carla Erb12BCDE, Justin Joy2E, Hanady Zainah2EG, Majed Mark Samarneh3BEGDOI: 10.12659/AJCR.937084
Am J Case Rep 2022; 23:e937084
Figure 1. Average creatine phosphokinase (CPK) levels for each of the 4 patients over the course of the hospital stay compared to the upper limit of normal (ULN) for CPK as determined by the hospital system (308 U/L). The average CPK levels of patients, 1, 2, 3, and 4 were 13 232, 11 687.5, 12 915.8, and 9590, respectively, which were all significantly greater than the ULN (P values: 0.0035, 0.0113, 0.0003, and 0.0128, respectively).