Table 3.

Demographic and clinical characteristics of study participants divided into tertiles on the basis of serum IgM

CharacteristicsSerum IgMP Value
Low (range, 24–133 mg/dl)Middle (range, 134–169 mg/dl)High (range, 169.1–510 mg/dl)
Sex, n (%)
 Male22 (82)18 (67)12 (46)0.03a
 Female5 (19)9 (33)14 (54)
Age (yr), mean (SD)4.52 (4.26)4.52 (3.51)5.12 (3.84)0.81b
Selectivity index (n=73), mean (SD)0.12 (0.17)0.07 (0.07)0.05 (0.05)0.08b
Serum total protein (g/dl, n=79), mean (SD)4.29 (0.67)4.10 (0.38)4.32 (0.66)0.38b
Serum albumin (g/dl, n=80), mean (SD)1.43 (0.60)1.34 (0.52)1.35 (0.52)0.80b
TP/Alb ratio (n=79), mean (SD)3.47 (1.42)3.86 (2.82)3.60 (1.21)0.77b
eGFR (ml/m2 per h, n=72), mean (SD)140.50 (61.31)116.38 (48.19)126.24 (58.81)0.32b
Total cholesterol (mg/dl, n=76), mean (SD)388.07 (95.66)416.96 (126.23)403.52 (92.11)0.62b
Serum IgG (mg/dl, n=80), mean (SD)279.80 (143.29)290.90 (166.24)423.92 (374.94)0.07b
Serum IgA (mg/dl, n=77), mean (SD)105.27 (60.71)117.80 (53.01)142.91 (71.65)0.10b
Complement C3 (mg/dl, n=75), mean (SD)144.51 (25.36)128.37 (38.37)128.27 (22.56)0.11b
Urinary total protein (mg/dl, n=79), mean (SD)1563.66 (1265.38)1887.19 (1795.20)1906.98 (2031.51)0.72b
Urinary TP/Cre ratio (n=78), mean (SD)14.00 (10.10)15.86 (14.32)17.25 (10.17)0.61b
Hematuria (n=69), n (%)14.00 (42)10.00 (57)14.00 (36)0.38b
  • N=80. TP, total protein; Alb, albumin; Cre, creatinine.

  • a Chi-squared test

  • b ANOVA.