Table 3 Multivariable linear regression with race and sex interaction variable analysis of the proportion of dwell time to hospital length of stay for admitted patients

Demographics

Interaction of Sex and Race

Black Female

Reference

Reference

Black Male

10.0%

0.095 (0.074, 0.117)

< 0.001

White Female

7.9%

0.076 (0.059, 0.093)

< 0.001

White Male

19.6%

0.179 (0.161, 0.196)

< 0.001

Age, category

18–64

Reference

Reference

65–80

-7.3%

-0.075 (-0.089, -0.062)

< 0.001

> 80

-11.4%

-0.122 (-0.137, -0.106)

< 0.001

Body mass index, category

Healthy weight

Reference

Reference

Underweight

-12.6%

-0.135 (-0.163, -0.106)

< 0.001

Overweight

5.1%

0.050 (0.035, 0.065)

< 0.001

Obesity

2.6%

0.026 (0.011, 0.040)

< 0.001

Medical History

Charlson Comorbidity Index

≥ 5

Reference

Reference

0

9.5%

0.091 (0.068, 0.114)

< 0.001

1–2

1.8%

0.018 (-0.006, 0.042)

0.147

3–4

2.0%

0.020 (-0.006, 0.046)

0.137

Missing

5.5%

0.053 (0.025, 0.081)

< 0.001

Hospital Course

Emergency Severity Index

3.9%

0.038 (0.028, 0.048)

< 0.001

Use of Intravenous Vesicant

No

Reference

Reference

Yes

-0.6%

-0.006 (-0.019, 0.007)

0.358

PIVC Characteristics

Gauge

18

Reference

Reference

20

1.1%

0.011 (-0.004, 0.026)

0.152

22

-18.8%

-0.208 (-0.237, -0.179)

< 0.001

24

-31.2%

-0.374 (-0.488, -0.260)

< 0.001

Insertion Method

Traditional

Reference

Reference

Ultrasound Guided

-18.9%

-0.209 (-0.237, -0.182)

< 0.001

Orientation

Left

Reference

Reference

Right

-1.4%

-0.014 (-0.026, -0.003)

0.014

Location

Antecubital

Reference

Reference

Forearm

6.7%

0.065 (0.051, 0.078)

< 0.001

Hand/Wrist

-15.0%

-0.163 (-0.194, -0.132)

< 0.001

Upper Arm

-12.6%

-0.134 (-0.165, -0.104)

< 0.001

Other

-17.7%

-0.195 (-0.218, -0.171)

< 0.001