Table 3 Univariable Cox model for recurrent suspected NAT with escalating severity of injury

Male

1.119

0.702

1.784

0.637

Lives in rural area^a

1.513

0.933

2.453

0.093

 0–6 months

ref

0.107

 6–12 months

1.707

0.789

3.693

 12–18 months

2.346

1.098

5.010

 18–24 months

1.877

0.803

4.386

 24–30 months

2.277

0.918

5.649

  > 30 months

0.764

0.254

2.303

 Fracture

0.201

0.087

0.466

0.0002

 Dislocation

0.885

0.286

2.743

0.833

 Burn

0.667

0.094

4.739

0.686

 Intracranial

0.169

0.023

1.227

0.079

 Open wound

2.041

1.206

3.452

0.008

 Superficial Injuries

1.945

1.124

3.367

0.017

 Contusions

1.123

0.681

1.850

0.650

 Head/neck

0.347

0.174

0.692

0.003

 Face

1.206

0.525

2.772

0.659

 Chest

0.724

0.423

1.239

0.239

 Abdomen and pelvic contents

0.506

0.120

2.140

0.355

 Extremities or pelvic girdle

0.500

0.287

0.872

0.015

 External

1.336

0.786

2.270

0.284

 0–1

ref

<.0001

 2–3

0.408

0.242

0.687

 4+

0.127

0.045

0.352

Percent of individuals living below poverty in patient’s zip code > cohort median of 19.75%^a

0.612

0.380

0.987

0.044