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. Author manuscript; available in PMC: 2021 Jul 14.
Published in final edited form as: Gynecol Oncol. 2020 Feb 21;157(2):508–513. doi: 10.1016/j.ygyno.2020.02.029

Table 5:

Multivariable Cox Proportional Hazards model of mortality controlling for quartiles of volume

Characteristics Adjusted Hazards Ratio
 Number of patients 3,469
 Number of hospitals 598
Age of diagnosis
 <40 Referent
 40–49 0.83 (0.55–1.24)
 50–59 1.31 (0.88–1.95)
 60–69 1.20 (0.75–1.92)
 70–79 1.45 (0.69–3.06)
 >/=80 5.90 (2.61–13.33)*
Race
 White Referent
 Black 1.02 (0.67–1.56)
 Hispanic 0.38 (0.23–0.64)*
 Other 0.88 (0.46–1.71)
 Unknown 0.62 (0.08–4.51)
Year of diagnosis
 2011 Referent
 2012 1.01 (0.74–1.38)
 2013 0.91 (0.63–1.31)
Insurance
 Private Referent
 Medicaid 1.47 (1.02–2.10)*
 Medicare 1.85 (1.21–2.81)*
 Other government/unknown 1.34 (0.66–2.73)
 Uninsured 1.07 (0.57–2.02)
Median household income
 <$38,000 Referent
 $38,000-$47,999 0.92 (0.60–1.40)
 $48,000-$62,999 0.93 (0.63–1.38)
 $63,000+ 0.70 (0.44–1.10)
 Unknown 1.83 (0.19–17.12)
Comorbidity score
 0 Referent
 1 1.06 (0.72–1.57)
 >/= 2 0.46 (0.14–1.52)
Facility type
 Academic/Research Referent
 Community cancer 1.83 (0.84–3.95)
 Comprehensive community ca 1.36 (0.99–1.86)
 Integrated network cancer 1.10 (0.67–1.82)
Stage
 1A2 0.54 (0.28–1.03)
 1B1 Referent
Histology
 Squamous cell Referent
 Adenocarcinoma 0.71 (0.49–1.03)
 Adenosquamous 1.39 (0.81–2.40)
Grade
 Well Referent
 Moderate 1.07 (0.63–1.83)
 Poorly 2.36 (1.34–4.16)*
 Unknown 0.80 (0.38–1.70)
Hysterectomy type
 Simple Referent
 Radical 0.97 (0.72–1.30)
Route of surgery
 Open Referent
 Minimally invasive 1.27 (0.97–1.67)
Lymphadenectomy
 No Referent
 Yes 1.18 (0.65–2.16)
Prior year volume, quartiles
 Low Referent
 High 1.07 (0.70–1.64)
 Medium High 0.99 (0.70–1.40)
 Medium Low 1.03 (0.67–1.60)
*

p-value <0.05