Table 1.

Comparison of baseline demographic and clinical characteristics between patients with follow-up information and patients who were lost to follow-upa

Baseline CharacteristicPatients with Follow-up Information (n = 294)Patients Who Were Lost to Follow-up (n = 120)Pb
Age (yr; n [%])0.72
    18 to 6466 (22)25 (21)
    ≥65228 (78)95 (79)
Gender (n [%])0.62
    male186 (63)79 (66)
    female108 (37)41 (34)
Baseline eGFR (ml/min per 1.73 m2)
    ≤30 (n [%])19 (6)13 (11)0.13
    >30 (n [%])275 (94)107 (89)
    mean ± SD50.0 ± 12.049.0 ± 13.30.19
Hypertension (n [%])240 (82)100 (83)0.68
Diabetes (n [%])114 (39)56 (47)0.14
Duration of diabetes (yr; mean ± SD)13.1 ± 8.713.2 ± 8.30.91
Change in SCr (mean ± SD)0.09 ± 0.220.11 ± 0.240.43
CIN rates (%)
    SCr increase ≥0.3 mg/dl17.321.70.31
    ScysC increase ≥25%16.121.60.23
    ScysC increase ≥20%19.427.80.09
    ScysC increase ≥15%24.833.00.13
  • a CIN, contrast-induced nephropathy; eGFR, estimated GFR; SCr, serum creatinine; ScysC, cystatin C.

  • b P value is from χ2 test or t test, as appropriate.