an increasing trendP <0.05
B2M and CysC both exhibited an increasing trend in the NT, EH, and PA groups (B2M: 1.60±0.34 mg/L vs. 1.80±0.41 mg/L vs. 1.98±0.64 mg/L, respectively, P <0.05; CysC: 0.76±0.12 mg/L vs. 0.88±0.17 mg/L vs. 0.94±0.23mg/L, respectively, P <0.05).