a significant trendP<0.001
presenting with mild TBI (GCS 13–19) (P<0.001), while there was no marked difference in terms of serum C1q levels between patients with moderate TBI and those who presented with mild TBI (P>0.05) ( Figure 3 ); (3) when Rotterdam CT classification was identified as a qualitative variable, there was a significant trend that serum C1q levels were substantially elevated, with increasing Rotterdam CT classification (P<0.001) ( Figure 4 ).