Table 3 Multiple logistic regression analysis to identify predictors of SBP decrease of more than 30 mmHg during hemodialysis session.

From: Predialysis central arterial waveform and blood pressure changes during hemodialysis

Variable, unit of increase

1st sessiona

2nd sessionb

OR

95% CI

p value

OR

95% CI

p value

Age, 1-SD (11.3 year)

1.61

0.93–2.93

0.09

1.59

0.95–2.78

0.08

Sex, male

0.81

0.27–2.46

0.71

0.34

0.22–1.01

0.06

Diabetes mellitus, yes

1.48

0.55-4.00

0.44

1.92

0.67–5.69

0.22

Hemodialysis time, 1-SD (25.5 min/session)

0.99

0.58–1.73

0.97

0.87

0.50–1.66

0.92

Blood flow rate, 1-SD (34.8 ml/min)

1.01

0.58–1.74

0.96

1.05

0.62–1.81

0.84

Fractional shortening, 1-SD (6.88%)

0.74

0.45–1.19

0.21

0.61

0.37–0.98

< 0.05

Ultrafiltration per body weight, 1-SD (16.9 ml/kg for 1st session, 14.6 ml/kg for 2nd session)

1.08

0.69–1.75

0.73

1.02

0.65–1.60

0.92

Pre-HD SBP, 1-SD (24 mmHg for 1st session, 25 mmHg for 2nd session)

3.85

2.15–7.50

< 0.001

3.98

2.18–8.14

< 0.001

SEVR, 1-SD (29.4% for 1st session, 27.0% for 2nd session)

0.46

0.23–0.83

< 0.01

0.56

0.37–0.94

< 0.05

  1. Multiple logistic regression analysis was performed after including age, sex, diabetes, hemodialysis time, blood flow rate, fractional shortening, ultrafiltration per body weight, SBP and SEVR.
  2. CI: confidence interval, HD: hemodialysis, OR: odds ratio, SBP: brachial systolic blood pressure, SD: standard deviation, SEVR: subendocardial viability ratio.
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