Table 1.

Characteristics of study population among those with and without CKDa

CharacteristicCKD (29%)No CKD (71%)
Age (yr; n [%])
    <45636 (0.9)10,737 (6.1)
    45 to 5912,432 (17.4)74,827 (42.6)
    60 to 7428,395 (39.6)57,607 (32.8)
    ≥7530,203 (42.1)32,339 (18.4)
Male (n [%])69,338 (96.8)167,692 (95.6)
Black (n [%])11,450 (16.0)34,098 (19.4)
GFR (ml/min per 1.73 m2; mean [SD])42.5 (14.0)87.9 (22.5)
Diabetes (n [%])37,130 (51.8)60,360 (34.4)
CVD (n [%])b43,589 (60.8)61,871 (35.3)
Cancer (n [%])c21,742 (30.3)45,814 (26.1)
Charlson Comorbidity Index (n [%])
    0 to 112,652 (17.7)64,926 (37.0)
    2 to 322,434 (31.3)57,846 (33.0)
    ≥436,580 (51.0)52,738 (30.1)
LOS (d; n [%])
    <3 days24,337 (34.0)67,941 (38.7)
    ≥347,329 (66.0)107,569 (61.3)
eGFR (n [%])
    ≥60176,020 (100)
    45 to <6037,768 (53.1)
    30 to <4520,268 (28.5)
    <3013,120 (18.4)
  • a All comparisons were significant at P < 0.001.

  • b One or more of the following: Congestive heart failure, coronary artery disease, or cerebrovascular disease.

  • c Excluding nonmelanomatous skin cancer.