4.1 Patient characteristics
The average age of the patients was 62.72 ± 12.10 years old, and 40.6%
(n = 43) of them were men. 67.9% (n=72) had a medical history of
hypertension, 20.8% (n=22) were diabetes, and 34.0% (n=36) were CHD.
The mean ± SD of the diameter of the radial artery was 2.22 ± 0.41mm.
The mean ± SD of the diameter of the distal radial artery was 2.0586 ±
0.33mm. There was a significant difference in the diameter of the radial
artery and the distal radial artery (P = 0.002). The mean difference in
size between radial artery and distal radial artery was 0.16 mm. The
distal radial artery showed a mean diameter reduction of about 7.2%.
The diameter of the distal radial artery in males and females was 0.217
± 0.031, 0.198 ± 0.033, respectly (P = 0.003). According to the mean of
the diameter of the distal radial artery, the patients were divided into
two groups——diameter ≥ 2.0586 mm group (n = 53) and diameter
< 2.0586 mm group (n = 53). Patients’ characteristics are
presented in Table 1.
4.2 Univariate and multivariate logistic regression analysis
The male was 25.5% (n=27) in the diameter ≥ 2.0586 mm group and 15.1%
(n=16) in the diameter < 2.0586 mm group (OR = 2.401, P =
0.031). The percentage of weight ≥ 63 kg in the diameter ≥ 2.0586 mm
group was larger than the diameter < 2.0586 mm group (OR =
2.325, P = 0.034). By comparing the two groups, the related factors and
independent predictors of the distal radial artery diameter ≥ 2.0586 mm
were obtained. Male gender, height ≥ 160 cm, weight ≥ 63 kg, body mass
index (BMI) ≥ 24 kg/m2, and body surface area (BSA) ≥ 1.6573 m2 were
related factors. Male gender and BMI ≥ 24 kg/m2 were independent
predictors. Both BMI and BSA were calculated according to height and
weight, so we did not carry out multivariate logistics regression for
them at the same time. We put them into multivariate logistics
regression respectively. Therefore there were three models (Table 2).