Association between the Delta Estimated Glomerular Filtration Rate and the Prevalence of Monoclonal Gammopathy of Undetermined Significance in Korean Males

Table 1

Baseline demographic chracteristics of the study population stratified by age.

Variable	40–49 yrs	50–59 yrs	≥60 yrs	All
𝑁	172	367	184	723
Age (yrs)	47.0±1.7	54.3±2.9	65.4±5.2	55.4±7.4
Interval of health checkup (days)	395.6±97.3	394.5±91.7	420.2±113.4	401.3±99.4
Current sCr (mg/dL)	0.989±0.123	0.996±0.155	1.015±0.155	0.999±0.148
Previous sCr (mg/dL)	0.943±0.113	0.941±0.117	0.968±0.129	0.949±0.120
Current eGFR (mL/min/1.73 m^2)	82.6±11.5	80.2±12.6	75.6±12.8	79.6±12.7
Previous GFR (mL/min/1.73 m^2)	87.7±12.6	85.3±11.9	79.8±12.7	84.5±12.6
ΔeGFR/yr (%)	−5.1±9.0	−5.6±8.5	−4.7±8.0	−5.3±8.5
𝜅 FLC (mg/L)	9.77 (2.38–25.91)	10.76 (2.17–292.53)	11.54 (2.17–1,265.95)	11.10 (2.17–1,265.95)
𝜆 FLC (mg/L)	11.13 (6.38–30.31)	11.71 (2.51–34.71)	12.06 (2.51–34.71)	11.84 (2.51–34.71)
κ/𝜆 ratio	0.84 (0.19–1.99)	0.91 (0.33–44.26)	0.94 (0.33–156.68)	0.92 (0.19–156.68)

Data expressed as means ± standard deviation or medians (range).
Abbreviations: CKD-EPI: Chronic Kidney Disease Epidemiology Collaboration; eGFR: estimated glomerular filtration rate; FLC: free light chain; MDRD: Modification of Diet in Renal Disease; sCr: serum creatinine.