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Table 1 Characteristics of the study population

From: Extracapsular extension is not a significant prognostic indicator in non-squamous cancers of the major salivary glands

Variable, p-value of chi-squarea No. (%)
Total (n = 1015) ECE Negative (n = 611) ECE Positive (n = 404)
Age, p = 0.609
 ≤54 226 (22.3) 140 (22.9) 86 (21.3)
 55–64 264 (26.0) 151 (24.7) 113 (28.0)
 65–74 234 (23.0) 139 (22.8) 95 (23.5)
 ≥75 291 (28.7) 181 (29.6) 110 (27.2)
Sex, p = 0.009
 Female 324 (31.9) 214 (35.0) 110 (27.2)
 Male 691 (68.1) 397 (65.0) 294 (72.8)
Race, p = 0.273
 White 853 (84.0) 508 (83.1) 345 (85.4)
 Black 80 (7.9) 52 (8.5) 28 (6.9)
 Hispanic 46 (4.5) 25 (4.1) 21 (5.2)
 Asian/Pacific Islander 27 (2.7) 21 (3.4) 6 (1.5)
 Other/Unknown 9 (0.9) 5 (0.8) 4 (1.0)
Charlson/Deyo Score, p = 0.815
 0 809 (79.7) 491 (80.4) 318 (78.7)
 1 156 (15.4) 91 (14.9) 65 (16.1)
 ≥2 50 (4.9) 29 (4.8) 21 (5.2)
Pathologic T Stage, p < 0.001
 1 134 (13.2) 101 (16.5) 33 (8.2)
 2 246 (24.2) 167 (27.3) 79 (19.6)
 3 347 (34.2) 192 (31.4) 155 (38.4)
 4 288 (28.4) 151 (24.7) 137 (33.9)
Pathologic N Stage, p < 0.001
 1 373 (36.8) 296 (48.4) 77 (19.1)
 2 633 (62.4) 312 (51.1) 321 (79.5)
 3 9 (0.9) 3 (0.5) 6 (1.5)
Grade, p = 0.001
 Low 64 (6.3) 48 (7.9) 16 (4.0)
 Intermediate 191 (18.8) 130 (21.3) 61 (15.1)
 High 590 (58.1) 328 (53.7) 262 (64.8)
 Unknown 170 (16.8) 105 (17.2) 65 (16.1)
Surgical Margins, p < 0.001
 Negative 553 (54.5) 363 (59.4) 190 (47.0)
 Positive 462 (45.5) 248 (40.6) 214 (53.0)
Histology, p = 0.736
 Squamous Cell 368 (36.3) 219 (35.8) 149 (36.9)
 Non-Squamous Cell 647 (63.7) 392 (64.2) 255 (63.1)
Radiotherapy, p = 0.003
 Not Administered 232 (22.9) 159 (26.0) 73 (18.1)
 Administered 783 (77.1) 452 (74.0) 331 (81.9)
Chemotherapy, p < 0.001
 Not Administered 675 (66.5) 451 (73.8) 224 (55.4)
 Administered 340 (33.5) 160 (26.2) 180 (44.6)