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Table 2 Patient demographics of 603 dialysis patients, divided into three groups depending on whether systolic blood pressure (SBP) fell by 20 mmHg or greater (group 1), fell by less than 20 mmHg or increased by less than 10 mmHg (group 2), or increased by more than 10 mmHg (group 3)

From: Falls in systolic blood pressure during dialysis which require no nursing intervention are associated with increased patient intra-dialytic symptom self-reporting and prolonged post-dialysis recovery times

VariableGroup 1Group 2Group 3
Number of patients187301115
Male (%)106 (56.7)182 (60.5)79 (68.7)
Age years62.9 ± 14.364.6 ± 17.466.5 ± 16.6
Diabetic (%)94 (50.3)122 (40.5)53 (46.1)
White ethnicity (%)81 (43.3)123 (40.9)54 (47.0)
Vintage months34.7(15.7–68.6)32.9(14–71.3)27.2(9.2–54.9)
Frailty4 (3–5)4 (3–5)4 (3–5)
Comorbidity grade2 (1–2)1 (1–2)1 (1–2)
Distress thermometer4.0 (1.0–6.0)4.0 (1.0–6.0)3.0 (0–6.0)
Pre-dialysis weight kg77.1 ± 19.672.5 ± 16.472.0 ± 18.8*
Pre-dialysis systolic blood pressure mmHg159.4 ± 20.5142.1 ± 26.2***130.6 ± 23.1***
Dialysis session time hours3.79 ± 0.503.60 ± 0.50*3.72 ± 0.50
% weight loss2.5 ± 1.12.1 ± 1.4*2.0 ± 1.3*
Ultrafiltration rate ml/kg/h4.4 ± 0.74.5 ± 0.74.4 ± 0.7
Serum minus dialysate sodium mmol/L2.5(0–4)2(− 1 to 4)2 (− 1 to 4)
Dialyzer surface area m22.0 ± 0.21.9 ± 0.3*1.9 ± 0.3
Urea reduction ratio %72.9 ± 9.272.9 ± 9.673.4 ± 7.8
Haematocrit0.349 ± 0.0530.338 ± 0.046*0.335 ± 0.044*
Serum albumin g/L38.9 ± 4.338.2 ± 4.438.0 ± 4.8
C reactive protein mg/L6 (3–11)5 (2–11)6 (2–12)
Blood glucose mmol/L6.2 (5.2–8.0)4.5 (5.4–8.0)6.7 (5.8–8.2)
N terminal brain natriuretic peptide ng/L3599 (1625–12381)3734 (1580–13958)3581 (1649–8528)
  1. Results displayed as integers, percentage, or median and interquartile range, *p < 0.05, **p < 0.01, ***< 0.001 vs group 1