Table 2 Cox proportional hazards regression model analysis of disease-specific survival (DSS) in white and black patients

 < 45

Reference

Reference

 ≥ 45

6.239(3.338,11.662)

P < 0.001

4.489(2.736,8.847)

0.007

 Male

Reference

Reference

 Female

0.749(0.606,0.927)

0.008

0.627(0.279,1.407)

0.258

 CPTC

Reference

Reference

 FVPTC

0.729(0.555,0.958)

0.023

0.991(0.397,2.472)

0.984

 FTC

1.797(1.294,2.498)

P < 0.001

0.747(0.224,2.485)

0.634

 Lobectomy

Reference

Reference

 Total thyroidectomy

0.779(0.540,1.124)

0.182

0.884(0.255,3.062)

0.846

 Total thyroidectomy and radioactive iodine

0.527(0.370,0.750)

P < 0.001

0.707(0.209)

2.391

 0

Reference

Reference

 1–3

0.870(0.639,1.185)

0.377

2.213(0.798,6.136)

0.127

 ≥ 4

0.903(0.637,1.280)

0.567

4.107(1.321,12.764)

0.015

 I

Reference

Reference

 II

1.896(1.083,3.320)

0.025

0.112(0.005,2.455)

0.165

 III

1.598(1.018,2.512)

0.041

0.350(0.031,3.974)

0.397

 IV

7.799(4.568,13.317)

P < 0.001

0.302(0.021,4.404)

0.381

 ≤ 10

Reference

Reference

 11–20

1.102(0.742,1.638)

0.297

0.944(0.140,6.372)

0.953

 21–40

1.730(1.157,2.588)

0.008

7.525(0.578,28.028)

0.123

 > 40

3.751(2.524,5.574)

P < 0.001

21.166(1.746,46.636)

0.017

 Intrathyroidal

Reference

Reference

 Minimal extrathyroidal

2.137(1.436,3.180)

P < 0.001

1.690(0.348,8.205)

0.515

 Gross extrathyroidal

3.571(2.630,4.847)

P < 0.001

2.938(1.104,7.818)

0.031

 Negative

Reference

Reference

 Level VI

2.137(1.436,3.180)

0.017

1.551(0.429,5.600)

0.512

 Level I, II, III, IV, V, or VII

1.173(1.01717,1.684)

0.038

2.535(1.604,7.818)

0.035

 None

Reference

Reference

 Yes

4.961(3.710,6.634)

P < 0.001

15.021(3.652,62.452)

P < 0.001

 None

Reference

Reference

 Insured

0.680(0.301,1.539)

0.355

0.383(0.045,3.238)

0.378

 Any Medicaid

0.621(0.245,1.575)

0.315

2.054(.0235,17.921)

0.515