Table 1.

Characteristics of the sample at baseline

	Low fat, average protein		Low fat, high protein		Moderate fat, average protein		Moderate fat, high protein		Total sample
Number of participants	170		170		166		177		683
	Mean (SD)		Mean (SD)		Mean (SD)		Mean (SD)		Mean (SD)
Age	52 (9)		50 (10)		52 (9)		51 (9)		51 (9)
	n	%	n	%	n	%	n	%	n	%
Gender
Female	103	61	110	65	103	62	111	63	427	63
Male	67	39	60	35	63	38	66	37	256	37
Race
White	138	81	137	81	134	81	147	83	556	81
Black/African American	23	14	23	14	23	14	23	13	92	13
Asian	9	0	1	1	0	0	2	1	3	1
Hispanic	6	4	6	4	7	4	4	2	23	3
Other	3	2	3	2	2	1	1	1	9	1
	Mean (SD)		Mean (SD)		Mean (SD)		Mean (SD)		Mean (SD)
Body mass index (kg/m2)	33 (4)		33 (4)		32 (4)		33 (4)		33 (4)
	n	%	n	%	n	%	n	%	n	%
Body mass index (kg/m2)
Categories
25–29.9	40	24	47	27	47	28	53	30	187	27
≥30	130	76	123	73	119	72	124	70	496	73
	Mean(SD)		Mean(SD)		Mean(SD)		Mean(SD)		Mean(SD)
Education
≤ High school	21	12	12	7	14	8	16	9	63	9
Some college	40	24	36	21	33	20	34	19	143	21
≥ College grad	109	64	122	72	119	72	127	72	477	70
Marital status
Married	132	65	146	72	144	71	143	71	565	70
Divorced/Separated	36	18	24	12	33	16	29	14	122	15
Widowed	8	4	4	2	4	2	2	1	18	2
Never married	28	14	28	14	23	11	27	13	106	13
Household income
< 50 K	43	25	34	20	36	22	40	26	153	22
50–100 K	70	41	69	41	63	38	71	40	273	40
100–150 K	39	23	38	22	36	22	29	16	142	21
> 150 K	17	10	28	16	29	17	34	19	108	16
Refused	1	1	1	1	2	1	3	2	7	1

The baseline characteristics of this table represent the “ancillary study sample” that is represented in Fig. 1. SD Standard deviation, K $1000