Table 1.

Characteristics of women diagnosed with endometrial cancer in the NIH-AARP study population by BMI (kg/m²; n = 580)

Body mass index (BMI)	18.5 ≤ 25		25 ≤ 30		30 ≤ 35		35+		p value
Deaths/n	21/172		26/160		21/133		23/115		0.358
Age at diagnosis, years (mean, SD)	67.3	(0.4)	67.4	(0.5)	67.2	(0.5)	64.4	(0.5)	<0.001
Pre-diagnosis BMI, kg/m2(mean, SD)	22.8	(2.8)	27.2	(3.4)	32.5	(4.0)	39.9	(6.5)	<0.001
	n	%	n	%	n	%	n	%
Tumor summary stage									0.245
Localized	105	61.1	96	60.0	91	68.4	61	53.0
Regional/distant	17	9.9	14	8.8	6	4.5	11	9.6
Unknown	50	29.1	50	31.3	36	27.1	43	37.4
Tumor grade at diagnosis									0.105
Well differentiated	84	51.5	69	45.1	67	54.9	68	61.3
Moderately differentiated	59	36.2	56	36.6	43	32.3	37	33.3
Poorly differentiated	18	11.0	24	15.7	11	9.0	4	3.6
First course of treatment
Surgery									0.006
Yes	160	93.0	142	88.8	115	86.5	91	79.1
No	12	7.0	18	11.3	18	13.5	24	20.9
Radiation									0.191
Yes	25	14.5	32	20.0	18	13.5	13	11.3
No	116	67.4	104	65.0	87	65.4	72	62.6
Missing	31	18.0	24	15.0	28	21.1	30	26.1
Chemo									0.077
Yes	7	4.1	6	3.8	3	2.3	1	0.9
No	151	87.8	144	90.0	117	88.0	95	82.6
Missing	14	8.1	10	6.3	13	9.8	19	16.5
Education									0.401
<High school/high school graduate	43	25.0	39	24.4	43	32.3	28	24.4
Post-high school/some college	53	30.8	55	34.4	46	34.6	42	36.5
College or graduate degree	73	42.4	61	38.1	39	29.3	44	38.3
Race/ethnicity									0.299
Non-Hispanic White	165	95.9	157	98.1	126	94.7	107	93.0
Other	6	3.5	1	0.6	5	3.8	7	6.1
Self-reported diabetes									<0.001
No	170	98.8	151	94.4	114	85.7	97	84.4
Yes	2	1.2	9	5.6	19	14.3	18	15.7
Age at menarche									0.011
≤12 years old	76	44.2	83	51.9	69	51.9	74	64.4
13+ years old	96	55.8	77	48.1	64	48.1	41	36.7
Parity									0.077
Nulliparous	36	20.9	31	19.4	35	26.3	38	33.0
1–2	68	39.5	64	40.0	43	32.3	31	27.0
3–4	56	32.6	51	31.9	44	33.1	37	32.3
5+	9	5.2	14	8.8	11	8.3	9	7.8
Age at menopause									0.252
Pre-menopausal	20	11.6	19	11.9	5	3.8	11	9.6
<49	45	26.2	42	26.3	46	34.6	34	29.6
50 ≤ 54	73	42.4	77	48.1	59	44.4	56	48.7
55+	33	19.2	22	13.8	23	17.3	14	12.2
OC use									0.203
Never	110	64.0	102	63.8	101	75.9	78	67.8
Ever	61	35.5	58	36.3	32	24.1	37	32.2
Hormone use at baseline									<0.001
Never	56	32.6	76	47.5	100	75.2	93	80.9
Ever	116	67.4	84	52.5	33	24.8	22	19.1
Smoke									0.707
Never	84	48.8	80	50.0	80	60.2	64	55.7
Former	68	39.5	63	39.4	44	33.1	42	36.5
Current	16	9.3	13	8.1	7	5.3	6	5.2
Health status									<0.001
Excellent/very good	105	61.1	63	39.4	42	34.4	23	21.7
Good	44	25.6	76	47.5	63	51.6	51	48.1
Fair/poor	13	7.6	18	11.3	17	12.3	32	27.8
Marital status									0.611
Married or living as married	88	51.2	92	57.5	76	57.1	62	53.9
Not married	82	47.7	68	42.5	56	42.1	53	46.1
MET h/week (mean, SD)	29.5	(2.7)	17.1	(1.5)	13.7	(1.5)	13.0	(1.9)	<0.001
TV h/day (mean, SD)	2.9	(0.2)	3.3	(0.2)	4.3	(0.3)	4.5	(0.3)	<0.001

Column percentages may not add up to 100 % due to rounding or missing data

p values were calculated using the Chi-squared test for categorical variables and the t test for continuous variables