Table 1. Patient baseline characteristics.

	All N = 591	BMI A ≤ 18.5 N = 33	BMI B 18.6 – 34.9 N = 427	BMI C ≥ 35 N = 131	p-value
Age
Range	23-92	32-81	23-92	24-83	N.S.
Mean	52	52	52	52
Stage
I (Ia1, Ia2, Ib1, Ib2)	200	9	131	60	N.S.
II (IIa, IIb)	237	13	175	49
III (IIIa, IIIb)	139	9	110	20
IV (IVa, IVb)	15	2	11	2
BMI
Range	13-57	13-18.5	18.6-34.9	35-57	N.A.
Median	27.5	18	26.1	40.5
PET lymph nodes (LN)
None	261	11	182	68	N.S.
Pelvis	240	18	178	44
Pelvis & Para-artic	84	3	62	19
P+P+SCV	6	1	5	0
Histology
Squamous	502	29	368	105	N.S.
Adenocarcinoma	60	2	37	21
Other	29	2	22	5
Metformin
Yes	35	2	14	19	<0.0001
No	544	31	405	108
Unknown	12	0	8	4
Insulin
Yes	30	1	12	17	<0.0001
No	549	32	407	110
Unknown	12	0	8	4
Type II
Yes	75	2	33	40	<0.0001
No	504	31	386	87
Unknown	12	0	8	4