C1R and stroke disorder: For grip strength, several marginally significant proteins (ERBB1, adapter molecule crk, teratocarcinoma‐derived growth factor 1, complement C1r subcomponent, glutathione S‐transferase P) were no longer significant after excluding stroke participants and C‐X‐C motif chemokine 9 and Beta‐2‐microglobulin reached the statistical significance threshold (Table S7).