TABLE 4

Rates of Serious Diagnoses Identified Within 30 Days of the Index Visit in the Control Cohort

Principal Diagnosis (ICD-10-CM Code)nNo. Patients With SNNDs (%)P
Cough (R05.x) 118 516 53 (0.0) <.001 
Chest pain (R07.x) 82 743 81 (0.1) <.001 
Abdominal pain (R10.x) 272 915 228 (0.1) <.001 
Soft tissue complaints (M79.x) 58 976 64 (0.1) <.001 
Principal Diagnosis (ICD-10-CM Code)nNo. Patients With SNNDs (%)P
Cough (R05.x) 118 516 53 (0.0) <.001 
Chest pain (R07.x) 82 743 81 (0.1) <.001 
Abdominal pain (R10.x) 272 915 228 (0.1) <.001 
Soft tissue complaints (M79.x) 58 976 64 (0.1) <.001 

The P value was derived as a χ2 test of comparing each control group to the primary headache cohort.

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