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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: J Pediatr Surg. 2015 Mar 14;50(6):1014–1018. doi: 10.1016/j.jpedsurg.2015.03.027

Table 2.

Univariable analysis comparing various degrees of surgical resection in children with renal cell carcinoma. y = years, IQR = interquartile range.

Variable No Surgery Partial Nephrectomy Complete Nephrectomy P value
N (%) 39 (14) 40 (14) 204 (72)
Age, y 0.52
 <5 3 (8%) 2 (5%) 16 (8%)
 5–8 6 (15%) 5 (12.5%) 28 (14%)
 9–13 16 (41%) 9 (22.5%) 68 (33%)
 >13 14 (36%) 24 (60%) 92 (45%)
Female 14 (36%) 24 (60%) 94 (46) 0.10
Race/ethnicity 0.11
 White 14 (36%) 27 (68%) 114 (57%)
 Black 18 (46%) 8 (20%) 66 (33%)
 Other 7 (18%) 5 (12%) 20 (10%)
Median tumor size, cm (IQR) 3 (2, 7) 3 (2, 5) 6 (4, 9) <0.001
Tumor size 0.001
 ≤4 cm 12 (52%) 25 (66%) 60 (30%)
 4.1–7 cm 5 (22%) 9 (24%) 58 (29%)
 7.1–10 cm 3 (13%) 3 (8%) 44 (22%)
 >10 cm 3 (13%) 1 (3%) 38 (19%)
Clinical staging group <0.001
 I 7 (26%) 20 (91%) 45 (43%)
 II 0 (0%) 1 (4.5%) 26 (25%)
 III 0 (0%) 1 (4.5%) 20 (19%)
 IV 20 (74%) 0 (0%) 13 (13%)
Surgical margins 0.08
 Negative N/A 36 (97%) 182 (93%)
 Positive N/A 1 (3%) 14 (7%)
 Chemotherapy 20 (50%) 2 (5%) 31 (16%) <0.001
 Radiation therapy 6 (15%) 0 (0%) 6 (3%) 0.003