Table 2 Univariate and multivariate analysis of OS rates before PSM

Age, years

 <62

Reference

Reference

 62–77

3.407 (3.243—3.58)

< 0.001

3.359 (3.196—3.53)

< 0.001

 >77

10.289 (9.746—10.863)

< 0.001

9.642 (9.117—10.197)

< 0.001

Race

 Black

Reference

Reference

 White

0.78 (0.737—0.826)

< 0.001

0.694 (0.655—0.736)

< 0.001

 Others

0.611 (0.56—0.667)

< 0.001

0.612 (0.559—0.669)

< 0.001

Sex

 Female

Reference

Reference

 Male

1.572 (1.509—1.638)

< 0.001

1.484 (1.424—1.547)

< 0.001

Behavior recode

 Benign

Reference

Reference

 Borderline malignancy

1.587 (1.491—1.689)

< 0.001

1.532 (1.438—1.632)

< 0.001

 Malignant

3.345 (3.063—3.653)

< 0.001

2.975 (2.723—3.251)

< 0.001

Tumor size

 <20 mm

Reference

Reference

 20-62 mm

0.915 (0.853—0.981)

0.013

1.018 (0.949—1.092)

< 0.625

 > 62 mm

0.828 (0.745—0.921)

< 0.001

0.93 (0.836—1.034)

< 0.181

 unknown

1.116 (1.04—1.196)

0.002

1.006 (0.937—1.08)

< 0.868

Income

 < $50,000

Reference

Reference

 $50,000 - $59,999

0.774 (0.722—0.829)

< 0.001

0.87 (0.809—0.937)

< 0.001

 $60,000 - $70,000

0.715 (0.674—0.759)

< 0.001

0.794 (0.742—0.851)

< 0.001

 > $70,000

0.665 (0.628—0.704)

< 0.001

0.729 (0.681—0.781)

< 0.001

Rural/Urban

 Rural

Reference

Reference

 Urban

0.789 (0.744—0.837)

< 0.001

1.02 (0.951—1.094)

0.582

Surgical

 Surgical compliance

Reference

Reference

 Surgical noncompliance

2.404 (2.276—2.54)

< 0.001

1.564 (1.471—1.663)

< 0.001