Table 2.

Characteristics of the sample at baseline

	Low fat, average protein		Low fat, high protein		High fat, average protein		High fat, high protein		Total sample
N	204		202		204		201		811
	Mean (SD)		Mean (SD)		Mean (SD)		Mean (SD)		Mean (SD)
Age	51 (9)		50 (10)		52 (9)		51 (9)		51 (9)
	n	%	n	%	N	%	n	%	n	%
Gender
Female	126	62	135	67	125	61	129	64	515	64
Male	78	38	67	33	79	39	72	36	296	36
Race
White	159	78	158	78	165	81	161	80	643	79
Black/African American	33	16	33	16	28	14	33	16	127	16
Asian	1	0	1	0	1	0	2	1	5	1
Hispanic	8	4	7	3	9	4	5	2	29	4
Other	3	1	3	1	1	0	NA	NA	7	1
	Mean (SD)		Mean (SD)		Mean (SD)		Mean (SD)		Mean (SD)
BMI (kg/m2)	33 (4)		33 (4)		32 (4)		33 (4)		33 (4)
	n	%	n	%	N	%	n	%	n	%
BMI categories (kg/m2)
25–29.9	51	25	54	27	60	29	58	29	223	27
≥30	153	75	148	73	144	71	143	71	588	73
	Mean (SD)		Mean (SD)		Mean (SD)		Mean (SD)		Mean (SD)
Education
≤high school	23	11	15	7	19	9	19	9	76	9
Some college	47	23	47	23	45	22	41	20	180	22
≥college grad	134	66	140	69	140	69	141	70	555	68
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	56	27	45	22	48	24	46	23	195	24
50–100 K	79	39	82	41	78	38	84	42	323	40
100–150 K	46	23	43	21	43	21	32	16	164	20
>150 K	21	10	30	15	33	16	36	18	120	15
Refused	2	1	2	1	2	1	3	1	9	1

The baseline characteristics of this table represent all of the participants who enrolled in the study and do not reflect the “ancillary study sample” that is represented in Fig. 1