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. Author manuscript; available in PMC: 2014 Jul 8.
Published in final edited form as: J Hum Hypertens. 2010 Apr 22;25(2):98–105. doi: 10.1038/jhh.2010.42

Table 1.

Baseline characteristics of the HEMO study cohort

Baseline characteristic Entire cohort (N = 1846) By category of baseline pre-dialysis SBP (mmHg)
<120 (N = 116) 120-139 (N = 427) 140-159 (N = 658) 160-179 (N = 444) ≥180 (N = 199) P-trenda
Age, years, mean (s.d.) 57.6 (14.0) 58.6 (14.8) 56.5 (15.1) 57.7 (14.1) 57.7 (13.6) 59.1 (11.8) 0.19
Female sex (%) 56.2 44.8 54.8 56.4 56.5 64.8 < 0.01
Black race (%) 62.7 51.3 62.3 64.9 62.4 63.8 0.08
On antihypertensive medication (%) 79.1 55.9 67.5 82.8 86.3 89.5 < 0.01
Current smoker (%) 17.3 15.5 19.2 16.4 16.7 19.1 0.49
Cause of ESRD (%)
    Diabetic nephropathy 37.2 20.7 25.1 37.7 43.7 56.3
    Hypertension 31.7 33.6 37.7 32.1 27.9 25.6 < 0.01
    Glomerular disease 13.8 17.2 26.5 14.0 13.7 6.5
Other or unknown 17.3 28.5 21.6 16.3 14.6 11.6
Diabetes (%) 44.6 27.6 33.5 45.9 48.7 64.3 < 0.01
Modified ICED score (%)
    0–1 35.6 35.3 39.1 36.6 34.2 27.6
    2 31.3 29.3 28.3 32.4 34.2 28.6 0.03b
    3 33.2 35.3 32.6 31.0 31.5 43.7
BMI, mean (s.d.) 25.5 (5.3) 24.8 (5.4) 25.3 (5.0) 25.6 (5.3) 25.4 (5.0) 26.1 (5.9) 0.08
Vintage, years, median (IQR) 2.2 (0.9–4.7) 2.6 (1.4–6.4) 2.3 (0.9–5.0) 2.1 (0.9–4.6) 2.2 (0.9–4.2) 2.0 (1.0–4.0) < 0.01
Mean baseline serum albumin, g per 100ml, mean (s.d.) 3.6 (0.4) 3.6 (0.3) 3.6 (0.4) 3.6 (0.4) 3.6 (0.4) 3.6 (0.4) 0.66
Baseline serum total cholesterol, mg per 100ml, mean (s.d.) 172.6 (40.7) 164.8 (35.7) 168.5 (40.3) 176.3 (42.1) 172.9 (40.3) 173.1 (39.3) 0.05
Residual kidney function >0 (%) 32.9 23.3 29.0 37.2 32.2 34.2 0.03
Mean baseline spKt/V, mean (s.d.) 1.6 (0.2) 1.6 (0.2) 1.6 (0.2) 1.6 (0.2) 1.6 (0.2) 1.6 (0.2) 0.24

Abbreviations: BMI, body mass index; ESRD, end-stage renal disease; HEMO study, haemodialysis study; ICED, index of coexistent diseases, modified to exclude diabetes; IQR, interquartile range; SBP, systolic blood pressure; spKt/V, single-pool Kt/Vure^_

a

P-value for trend across the categories of baseline SBP calculated using one-sided Cochran-Armitage trend test or linear regression as appropriate.

b

P-value is from χ2-test.