sentence: Other proteins whose expression was increased with frailty included leptin ( β [ SE ] =0 .0327 [ 0.0042 ] ; p = 1.43 × 10 ) , coagulation factor IXab ( β [ SE ] =0 .1676 [ 0.0234 ] ; p = 1.64 × 10 ) , interleukin ‐ 1 receptor antagonist protein ( IL ‐ 1Ra ) ( β [ SE ] =0 .0918 [ 0.0133 ] ; p = 1.08 × 10 ) , follistatin ‐ related protein 3 ( FSTL3 ) ( β [ SE ] =0 .1048 [ 0.0154 ] ; p = 2.01 × 10 ) , peroxidasin homolog ( PXDN ) ( β [ SE ] =0 .0574 [ 0.0086 ] ; p = 4.66 × 10 ) , and HtrA serine peptidase 1 ( HTRA1 ) ( β [ SE ] =0 .1093 [ 0.0166 ] ; p = 7.55 × 10 ) .