Research Article

Treatment Patterns and Healthcare Resource Utilization among Patients with Advanced or Metastatic Soft Tissue Sarcoma in US Community Practices

Table 1

Baseline demographic and clinical characteristics overall and for the pre- and post-2016 cohorts.

Overall (n = 376)1L pre-October 2016 cohort (n = 97)1L post-October 2016 cohort (n = 279) valueOverall (n = 196)2L pre-October 2016 cohort (n = 77)2L post-October 2016 cohort (n = 119) value

Median age at 1L initiation (years, min, max)62 (20, 90+)62 (25, 84)62 (20, 90+)0.946060 (21, 86)60 (30, 82)61 (21, 86)0.8195
Male, n (%)182 (48.4)50 (51.5)132 (47.3)0.472290 (45.9)38 (49.4)52 (43.7)0.4380
Race, n (%)0.89020.8028
 Caucasian28 (76.3)74 (76.3)213 (76.3)144 (73.5)56 (72.7)88 (74.0)
 Black or African American27 (7.2)6 (6.2)21 (7.5)16 (8.2)6 (7.8)10 (8.4)
 Others15 (4.0)5 (5.2)10 (3.6)9 (4.6)5 (6.5)4 (3.4)
 No information47 (12.5)12 (12.4)35 (12.5)27 (13.8)10 (13.0)17 (14.3)
BMI, n (%)0.72850.8281
 Underweight (BMI < 18.5)9 (2.4)1 (1.0)8 (2.9)5 (2.6)1 (1.3)4 (3.4)
 Normal (BMI: 18.5 - < 25)104 (27.7)27 (27.8)77 (27.6)50 (25.5)20 (26.0)30 (25.2)
 Overweight (BMI: 25– < 30)116 (30.9)33 (34.0)83 (29.7)56 (28.6)24 (31.2)32 (26.9)
 Obese (BMI = 30+)147 (39.1)36 (37.1)111 (39.8)85 (43.4)32 (41.6)53 (44.5)
ECOG score, n (%)0.89930.8161
 062 (16.5)17 (17.5)45 (16.1)38 (19.4)15 (19.5)23 (19.3)
 1221 (58.8)57 (58.8)164 (58.8)116 (59.2)45 (58.4)71 (59.7)
 239 (10.4)8 (8.2)31 (11.1)13 (6.6)7 (9.1)6 (5.0)
 32 (0.5)0 (0.00)2 (0.7)1 (0.5)0 (0.00)1 (0.8)
 No information52 (13.8)15 (15.5)37 (13.3)28 (14.3)10 (13.0)18 (15.1)
Diagnosis, n (%)0.60240.3299
 Sarcoma213 (56.6)56 (57.7)157 (56.3)107 (54.6)41 (53.2)66 (55.5)
 Leiomyosarcoma83 (22.1)25 (25.8)58 (20.8)45 (23.0)23 (29.9)22 (18.5)
 Uterine sarcoma52 (13.8)12 (12.4)40 (14.3)30 (15.3)10 (13.0)20 (16.8)
 Fibrosarcoma14 (3.7)1 (1.0)13 (4.7)8 (4.1)1 (1.3)7 (5.9)
 Chondrosarcoma8 (2.1)2 (2.1)6 (2.2)3 (1.5)1 (1.3)2 (1.7)
 Rhabdomyosarcoma6 (1.6)1 (1.0)5 (1.8)3 (1.5)1 (1.3)2 (1.7)
Histology, n (%)0.16410.1871
 Angiosarcoma11 (2.9)8 (8.2)3 (1.1)7 (3.6)6 (7.8)1 (0.8)
 Fibroblastic/myofibroblastic10 (2.7)2 (2.1)8 (2.9)7 (3.6)2 (2.6)5 (4.2)
 Leiomyosarcoma87 (23.1)40 (41.2)47 (16.8)62 (31.6)35 (45.5)27 (22.7)
 Liposarcoma16 (4.3)4 (4.1)12 (4.3)9 (4.6)3 (3.9)6 (5.0)
 Nerve sheath sarcoma4 (1.1)2 (2.1)2 (0.7)1 (0.5)0 (0.00)1 (0.8)
 Others25 (6.6)7 (7.2)18 (6.5)15 (7.7)4 (5.2)11 (9.2)
 Rhabdomyosarcoma10 (2.7)5 (5.2)5 (1.8)7 (3.6)4 (5.2)3 (2.5)
 Synovial8 (2.1)4 (4.1)4 (1.4)6 (3.1)3 (3.9)3 (2.5)
 Undifferentiated pleomorphic sarcoma36 (9.6)19 (19.6)17 (6.1)24 (12.2)14 (18.2)10 (8.4)
 Documented unknown4 (1.1)2 (2.1)2 (0.7)3 (1.5)2 (2.6)1 (0.8)
 No information165 (43.9)4 (4.1)161 (57.7)55 (28.1)4 (5.2)51 (42.9)
Tumor location, n (%)0.56250.8542
 Axilla1 (0.3)1 (1.0)0 (0.00)1 (0.5)1 (1.3)0 (0.00)
 Breast2 (0.5)2 (2.1)0 (0.00)2 (1.0)2 (2.6)0 (0.00)
 Genitourinary5 (1.3)2 (2.1)3 (1.1)5 (2.6)2 (2.6)3 (2.5)
 Head or neck8 (2.1)5 (5.2)3 (1.1)4 (2.0)3 (3.9)1 (0.8)
 Lower limb47 (12.5)24 (24.7)23 (8.2)33 (16.8)18 (23.4)15 (12.6)
 Mediastinum, lung, pleura5 (1.3)3 (3.1)2 (0.7)4 (2.0)3 (3.9)1 (0.8)
 Others44 (11.7)19 (19.6)25 (9.0)29 (14.8)13 (16.9)16 (13.4)
 Pelvis5 (1.3)2 (2.1)3 (1.1)4 (2.0)2 (2.6)2 (1.7)
 Retroperitoneal20 (5.3)8 (8.2)12 (4.3)11 (5.6)7 (9.1)4 (3.4)
 Trunk10 (2.7)4 (4.1)6 (2.2)6 (3.1)3 (3.9)3 (2.5)
 Upper limb16 (4.3)5 (5.2)11 (3.9)10 (5.1)4 (5.2)6 (5.0)
 Uterus45 (12.0)16 (16.5)29 (10.4)29 (14.8)13 (16.9)16 (13.4)
 Documented unknown3 (0.8)2 (2.1)1 (0.4)3 (1.5)2 (2.6)1 (0.8)
 No information165 (43.9)4 (4.1)161 (57.7)55 (28.1)4 (5.2)51 (42.9)
Tumor grade, n (%)0.52870.4477
 Well differentiated17 (4.5)4 (4.1)13 (4.7)6 (3.1)2 (2.6)4 (3.4)
 Moderately differentiated47 (12.5)15 (15.5)32 (11.5)27 (13.8)13 (16.9)14 (11.8)
 Poorly differentiated158 (42.0)45 (46.4)113 (40.5)83 (42.3)36 (46.8)47 (39.5)
 Undifferentiated5 (1.3)1 (1.0)4 (1.4)2 (1.0)0 (0.00)2 (1.7)
 No information149 (39.6)32 (33.0)117 (41.9)78 (39.8)26 (33.8)52 (43.7)
Count of metastatic sites, n (%)<0.00010.3188
 0137 (36.4)16 (16.5)121 (43.4)54 (27.6)16 (20.8)38 (31.9)
 1127 (33.8)40 (41.2)87 (31.2)73 (37.2)28 (36.4)45 (37.8)
 271 (18.9)24 (24.7)47 (16.8)46 (23.5)20 (26.0)26 (21.8)
 329 (7.7)11 (11.3)18 (6.5)15 (7.7)8 (10.4)7 (5.9)
 47 (1.9)3 (3.1)4 (1.4)3 (1.5)2 (2.6)1 (0.8)
 55 (1.3)3 (3.1)2 (0.7)5 (2.6)3 (3.9)2 (1.7)
Bone, n (%)46 (12.2)18 (18.6)28 (10.0)0.027428 (14.3)14 (18.2)14 (11.8)0.2099
Bowel, n (%)4 (1.1)1 (1.0)3 (1.1)1.00002 (1.0)1 (1.3)1 (0.8)1.0000
Brain, n (%)3 (0.8)0 (0.00)3 (1.1)0.57201 (0.5)0 (0.00)1 (0.8)1.0000
Colon, n (%)3 (0.8)1 (1.0)2 (0.7)1.00001 (0.5)1 (1.3)0 (0.00)0.3929
Lymph node, n (%)37 (9.8)17 (17.5)20 (7.2)0.003220 (10.2)10 (13.0)10 (8.4)0.3005
Soft tissue, n (%)18 (4.8)7 (7.2)11 (3.9)0.193312 (6.1)5 (6.5)7 (5.9)0.8616
Liver, n (%)47 (12.5)16 (16.5)31 (11.1)0.167330 (15.3)14 (18.2)16 (13.4)0.3684
Lung, n (%)149 (39.6)54 (55.7)95 (34.1)0.000289 (45.4)43 (55.8)46 (38.7)0.0183
Skin, n (%)8 (2.1)3 (3.1)5 (1.8)0.43034 (2.0)3 (3.9)1 (0.8)0.3019
Other sites of, n (%)94 (25.0)31 (32.0)63 (22.6)0.066160 (30.6)24 (31.2)36 (30.3)0.8918

1L, first-line; 2L, second-line; BMI, body mass index; ECOG, Eastern Cooperative Oncology Group; Min, minimum; Max, maximum; SD, standard deviation. Variable assessed among patients selected for chart review (n = 211).