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14 August 2020: Database Analysis

The Role of Chemotherapy in Extraskeletal Osteosarcoma: A Propensity Score Analysis of the Surveillance Epidemiology and End Results (SEER) Database

Lin Qi 12ABCDEF , Lu Wan 123BC , Xiaolei Ren 12EF , Wenchao Zhang 12E , Chao Tu 12ADE* , Zhihong Li 12ADG*

DOI: 10.12659/MSM.925107

Med Sci Monit 2020; 26:e925107

Supplementary Table 1 Sociodemographic and clinical characteristics of study patients after propensity score matching.

CharacteristicOverall (n=202)Chemotherapy (n=101)No chemotherapy (n=101)P value
Age (year)97 (48.0)49 (48.5)48 (47.5)1
≥60105 (52.0)52 (51.5)53 (52.5)
GenderMale91 (45.0)46 (45.5)45 (44.6)1
Female111 (55.0)55 (54.5)56 (55.4)
RaceWhite163 (80.7)81 (80.2)82 (81.2)0.93
Black25 (12.4)12 (11.9)13 (12.9)
Other14 (6.9)8 (7.9)6 (5.9)
Insurance typeInsured66 (32.7)32 (31.7)34 (33.7)0.761
Any medicaid13 (6.4)8 (7.9)5 (5.0)
Unknown123 (60.9)61 (60.4)62 (61.4)
Marital statusSingle35 (17.3)18 (17.8)17 (16.8)0.898
Widowed/divorced47 (23.3)25 (24.8)22 (21.8)
Married113 (55.9)54 (53.5)59 (58.4)
Unknown7 (3.5)4 (4.0)3 (3.0)
Year of diagnosis1976 to 198516 (7.9)7 (6.9)9 (8.9)0.796
1986 to 199528 (13.9)12 (11.9)16 (15.8)
1996 to 200563 (31.2)33 (32.7)30 (29.7)
2006 to 201695 (47.0)49 (48.5)46 (45.5)
Primary siteExtremity84 (41.6)41 (40.6)43 (42.6)0.981
Trunk53 (26.2)26 (25.7)27 (26.7)
Visceral37 (18.3)19 (18.8)18 (17.8)
Other28 (13.9)15 (14.9)13 (12.9)
GradeGrade I/II12 (5.9)6 (5.9)6 (5.9)0.816
Grade III/IV134 (66.3)65 (64.4)69 (68.3)
Unknown56 (27.7)30 (29.7)26 (25.7)
StageLocalized91 (45)44 (43.6)47 (46.5)0.972
Regional68 (33.7)35 (34.7)33 (32.7)
Distant34 (16.8)17 (16.8)17 (16.8)
Unstaged9 (4.5)5 (5.0)4 (4.0)
Tumor size (mm)99 (49.0)52 (51.5)47 (46.5)0.574
≥73103 (51.0)49 (48.5)54 (53.5)
RadiationYes54 (26.7)25 (24.8)29 (28.7)0.634
No148 (73.3)76 (75.2)72 (71.3)
SurgeryYes175 (86.6)86 (85.1)89 (88.1)0.680
No27 (13.4)15 (14.9)12 (11.9)
mm – millimeter.

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750