a negative trendP = 0.004
Serum zinc showed a negative trend with estimated GFR ( P = 0.004) and significant reduction in albuminuria, with stage A3 ( n = 29, 65.7 ± 13.9 μg/dL) having lower levels than A1 ( n = 131, 76.4 ± 14.1 μg/dL, P = 0.001) and A2 ( n = 67, 78.4 ± 13.1 μg/dL, P < 0.001).