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Table 1 Baseline characteristics

From: Choosing an appropriate glomerular filtration rate estimating equation: role of body mass index

Variable Total Male(n = 505) Female(n = 332)
Age, years 60 (52, 69) 59 (51, 67) 62 (55, 71) *
Height, cm 167 (160.0, 172.3) 170 (167, 175) 160 (155, 163) *
Weight, kg 69 (60, 77) 74 (66, 81) 61 (54, 69) *
Body surface area (BSA), m2 1.81 (1.67, 1.95) 1.90 (1.80, 2.01) 1.66 (1.56, 1.77) *
Body mass index (BMI), Kg/m2 24.8 (22.7, 27.3) 25.1(23.1, 27.4) 24.2(21.6, 26.8) *
BMIP25, Kg/m2 (n = 209) 20.9 (19.6, 21.9)
BMIP25–75, Kg/m2 (n = 419) 24.8 (23.7, 25.9)
BMIP75, Kg/m2 (n = 209) 28.9 (28.0, 30.6)
Serum creatinine (sCr), μmol/L 79 (61, 113.3) 86 (68, 120) 66 (51, 100) *
Serum uric acids (sUA), μmol/L 360 (289, 435) 380 (311, 449) 323 (268, 421) *
Serum urea (sUrea), mmol/L 6.3 (5.0, 8.6) 6.5 (5.2, 8.6) 6.1 (4.8, 8.8)
Serum cystatin C (sCysc), mg/L 1.17 (0.97, 1.53) 1.18 (0.99, 1.53) 1.16 (0.94, 1.58)
Urinary albumin creatinine ratio (ACR), μg/mg 64.4 (18.3, 458.5) 73.8 (15.7, 522.8) 60.2 (23.9, 406.1)
ACR ≥ 30 μg/mg rate, % 64.03 62.80 66.10
Diabetes 559 (66.8%) 373 (73.9%) 186 (56.0%)*
Hypertension 540 (64.5%) 325 (64.4%) 215 (42.6%)
coronary heart disease 165 (19.7%) 102 (20.2%) 63 (12.5%)
atherosclerosis 599 (71.6%) 358 (70.9%) 241 (47.7%)
mGFR, ml·min −1·1.73 m 2 71.4 ± 28.1 69.8 ± 27.3 73.8 ± 29.2
distribution in each CKD stage
 CKD1 221 (26.4%) 123 (24.4%) 98 (29.5%)
 CKD2 338 (40.4%) 214 (42.4%) 124 (37.4%)
 CKD3 212 (25.3%) 130 (25.7%) 82 (24.7%)
 CKD4 54 (6.5%) 28 (5.5%) 26 (7.8%)
 CKD5 12 (1.4%) 10 (2.0%) 2 (0.6%)
eGFR
 eGFRa_MDRD 75.3(47.2, 105.1) 78.6(55.8, 104.7) 78.2(48.0, 110.0)
 eGFRc_MDRD 88.5 ± 49.1 87.9 ± 44.7 98.4 ± 54.4
 eGFREPI_Cr_2009 81.9 (52.2, 93.3) 82.5 (55.5, 101.2) 80.4 (48.5, 97.8)
 eGFREPI_Cr_CysC_2012 63.3 (42.0, 81.2) 63.5 (43.6,79.8) 62.2 (39.6, 82.2)
 eGFREPI_CysC_2012 62.8 (43.4, 82.3) 62.5 (44.1, 80.3) 62.8 (41.2, 84.5)
 eGFRFAS_Cr 77.7(51.6, 104.0) 78.8 ± 36.7 74.1(48.1, 104.6)
 eGFRFAS_CysC 60.2(44.9, 74.9) 60.8(45.9, 73.9) 61.4 ± 24.8
 eGFRFASCr_CysC 66.8(47.8, 85.6) 67.9 ± 28.3 66.0(46.3, 87.3)
  1. P > 0.05, P < 0.05, *P < 0.01, compared with male; P < 0.01, P > 0.05, compared with mGFR