Table 1.

Baseline characteristics of 15,353 adults with nondialysis-dependent CKD stages 3 to 5

CharacteristiceGFR, ml/min/1.73 m2
45 to 59 (n = 12,262)30 to 44 (n = 2049)15 to 29 (n = 776)<15 (n = 266)
Race-ethnicity, N (%)
    non-Hispanic white3441 (28)584 (29)213 (27)63 (24)
    non-Hispanic black2249 (18)585 (29)272 (35)85 (32)
    Hispanic2353 (19)316 (15)122 (16)52 (19)
    Asian/Pacific Islander2897 (32)506 (25)15 (20)60 (22)
    other race-ethnicity322 (3)58 (3)12 (2)6 (2)
Age, mean (SD), years60 (13)58 (15)56 (15)51 (15)
Age category, years, % (95% CI)
    <40918 (7)220 (11)117 (15)61 (23)
    40 to 491990 (16)401 (20)188 (24)70 (26)
    50 to 592933 (24)525 (26)201 (26)63 (24)
    60 to 693879 (32)460 (22)124 (16)45 (17)
    ≥702542 (21)443 (22)146 (19)27 (10)
Female, N (%)6782 (55)954 (47)320 (41)95 (36)
Unemployed, N (%)5723 (47)930 (45)333 (43)115 (43)
Homeless, N (%)612 (5)148 (7)74 (9)24 (9)
Annual income ≥$15,000, N (%)9021 (75)1387 (68)507 (65)175 (66)
Primary health coverage, N (%)
    uninsured2299 (19)285 (14)102 (13)25 (9)
    Medicaid2727 (22)531 (26)202 (26)99 (37)
    Medicare5101 (42)699 (34)237 (31)67 (25)
    commercial or other262 (2)43 (2)18 (2)6 (2)
    missing1873 (15)491 (24)217 (28)69 (26)
Primary language, N (%)
    English7946 (64)1535 (75)611 (78)206 (77)
    Spanish1491 (12)186 (9)63 (8)31 (12)
    Cantonese1518 (12)170 (8)53 (7)19 (7)
    other1307 (11)158 (8)49 (6)11 (4)
Comorbid conditions, N (%)
    diabetes2809 (23)414 (20)130 (17)33 (12)
    hypertension6036 (49)756 (37)221 (28)66 (25)
    cardiovascular disease2253 (18)303 (15)92 (12)18 (7)
    congestive heart failure797 (7)139 (7)38 (5)12 (4)
    chronic obstructive lung disease1970 (16)285 (14)97 (12)20 (7)
    AIDS/HIV567 (5)99 (5)37 (5)8 (3)
    HBV infection140 (1)17 (1)12 (2)0 (0)
    HCV infection499 (4)103 (5)41 (5)14 (5)
    alcoholism851 (7)207 (10)92 (12)28 (11)
    depression2006 (16)298 (14)93 (12)23 (9)
    drug abuse1762 (14)416 (20)190 (24)52 (20)
    tobacco smoking501 (4)94 (5)35 (5)8 (3)
Laboratory measurements
    urinalysis proteinuria, N (%)
        negative (<30 mg/dl)8091 (66)966 (47)239 (31)36 (13)
        trace to 1+ (30 to 99 mg/dl)2231 (18)509 (25)225 (29)57 (22)
        2+ (100 to 299 mg/dl)1242 (10)351 (17)182 (23)82 (31)
        ≥3+ (≥300 mg/dl)698 (6)223 (11)129 (17)91 (34)
    hemoglobin, mean (SD), g/dl13.1 (1.9)12.3 (2.3)11.9 (2.4)10.9 (2.8)
    serum albumin, mean (SD), g/dl4.0 (0.6)3.7 (0.8)3.4 (0.8)3.4 (0.7)
    Serum calcium, mean (SD) mg/dl9.1 (0.6)9.0 (0.8)8.8 (0.9)8.6 (1.4)