Table 1

Characteristics of the study group according to availability of five observations

eGFR observations
All≥5<5P value
CharacteristicN = 364N = 257N = 107
Women178 (48.9)128 (49.8)50 (46.7)0.59
At the time of earliest eGFR observation
 Age (years)33 (27, 40)34 (28, 40)32 (26, 40)0.42
 Diabetes duration (years)19 (15, 26)19 (16, 26)18 (14, 24)0.047
 Age of diabetes onset (years)12 (8, 17)12 (7, 17)12 (8, 17)0.50
 ACR (mg/g)1,262 (526, 2,500)1,299 (559, 2,500)966 (471, 2,500)0.18
 HbA1c (%)9.5 (8.4, 10.8)9.5 (8.4, 10.8)9.6 (8.3, 11.0)0.98
 HbA1c (mmol/mol)80.3 (68.3, 94.5)80.3 (68.3, 94.5)81.4 (67.2, 96.7)
 eGFR (mL/min/1.73 m2)73 (57, 97)71 (56, 87)84 (63, 109)0.001
Recorded at the research enrollment examination
 Systolic blood pressure (mmHg)134 (125, 148)135 (127, 150)134 (120, 144)0.21
 Diastolic blood pressure (mmHg)80 (74, 88)80 (74, 86)82 (78, 88)0.16
 Treatment with ACE-I or ARB241 (66.2)169 (65.8)72 (67.3)0.78
 Smoking
  Current75 (20.6)54 (21.0)21 (19.6)0.77
  Past111 (30.5)74 (28.8)37 (34.6)0.21
Follow-up
 Follow-up duration (years)6.6 (4.2, 9.9)6.7 (4.4, 9.8)6.1 (3.7, 10.5)0.22
 eGFR measurements10 (4, 18)15 (9, 24)3 (2, 4)
 eGFR measurements per year1.7 (0.6, 3.4)2.7 (1.3, 3.9)0.5 (0.3, 0.8)
 Death at ESRD onset63 (17.3)48 (18.7)15 (14.0)0.28
 Preemptive kidney transplant17 (4.7)13 (5.1)4 (3.7)0.59
  • Data are presented as n (%) or median (1st, 3rd quartile).

  • P value for comparison between patients with <5 and ≥5 eGFR observations.