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Table 3 Univariate and multivariate logistic regression analyses for factors associated with orthostatic hypotension, and orthostatic hypertension among 299 participants with diabetes aged 18–65 years, southwestern Uganda

From: Postural changes in blood pressure among patients with diabetes attending a referral hospital in southwestern Uganda: a cross-sectional study

Characteristic

Orthostatic hypotension (OH)

Orthostatic hypertension (OHT)

Univariate analysis

Multivariate analysis

Univariate analysis

Multivariate analysis

OR (95% CI)

aOR (95% CI)

P value

OR (95%CI)

aOR (95%CI)

P value

Age category

 18–50 years

Reference

Reference

 

Reference

Reference

 

 51–65 years

2.20 (1.16–4.16)

2.40 (1.02–5.67)

0.046

1.37 (0.71–2.64)

1.26 (0.50–3.16)

0.630

Sex

 Male

Reference

Reference

 

Reference

Reference

 

 Female

1.23 (0.63–2.40)

0.76 (0.32–1.82)

0.535

3.07 (1.25–7.55)

2.67 (0.96–7.55)

0.061

History of hypertensiona

 No

Reference

  

Reference

  

 Yes

2.55 (1.37–4.74)

  

1.90 (0.99–3.66)

  

History of palpitations

 No

Reference

Reference

 

Reference

Reference

 

 Yes

2.67 (1.41–5.06)

2.31 (1.08–4.92)

0.031

3.46 (1.67–7.16)

3.14 (1.42–6.95)

0.005

Body mass index

 < 25 kg/m2

Reference

Reference

 

Reference

Reference

 

 ≥ 25 kg/m2

1.14 (0.13–9.84)

1.29 (0.12–13.87)

0.832

1.18 (0.59–2.35)

1.04 (0.42–2.53)

0.937

Diabetic retinopathy

 No

Reference

Reference

 

Reference

Reference

 

 Yes

3.56 (1.89–6.72)

2.51 (1.14–5.53)

0.022

1.71 (1.03–2.85)

1.24 (0.56–2.75)

0.598

Duration of diabetes

 < 5 years

Reference

Reference

 

Reference

Reference

 

 5–10 years

0.62 (0.27–1.44)

0.49 (0.19–1.27)

0.143

0.86 (0.38–1.96)

0.64 (0.26–1.58)

0.331

 > 10 years

2.50 (1.23–5.08)

1.21 (0.48–3.06)

0.689

1.67 (0.96–3.71)

1.06 (0.40–2.80)

0.903

Pulse pressurea

 < 65 mmHg

Reference

  

Reference

  

 ≥ 65 mmHg

4.37 (2.32–8.21)

  

2.69 (1.37–5.30)

  

Resting systolic BP

 < 140 mmHg

Reference

Reference

 

Reference

Reference

 

 ≥ 140 mmHg

5.23 (2.51–10.90)

3.14 (1.31–8.7.56)

0.011

2.53 (1.26–5.08)

2.01 (1.10–4.42)

0.043

Resting diastolic BP

 < 90 mmHg

Reference

Reference

 

Reference

Reference

 

 ≥ 90 mmHg

2.42 (1.32–4.45)

1.60 (0.75–3.43)

0.224

1.37 (0.72–2.64)

0.88 (0.40–1.97)

0.764

QTc interval

 < 440 ms

Reference

Reference

 

Reference

Reference

 

 ≥ 440 ms

2.9 (1.58–5.39)

2.95 (0.99–6.14)

0.052

1.87 (0.97–3.58)

1.31 (0.63–2.69)

0.471

Glycosylated haemoglobin (HbA1c)

 ≤ 7.5%

Reference

Reference

 

Reference

Reference

 

 > 7.5%

0.98 (0.87–1.10)

1.06 (0.45–2.45)

0.901

1.01 (0.89–1.14)

0.75 (0.31–1.75)

0.499

  1. aOR adjusted odds ratio, OR odds ratio, OH orthostatic hypotension, OHT orthostatic hypertension, BP blood pressure; QTc heart rate corrected QT interval, CI Confidence interval
  2. aEliminated from the multivariate model because of collinearity