Table 1.

Characteristics of NHANES III adults ages 60 years and older by frailty; weighted means or percentages and SE.

	Frail n = 1,028		Pre-frail n = 1,294		Not frail n = 2,409		p-value
	Mean	SE	Mean	SE	Mean	SE
Age, yrs	73.1	0.5	71.8	0.4	69.4	0.3	< 0.001
Gender, %							< 0.001
Male	35.7	2.0	36.7	1.9	46.1	1.0
Female	64.3	2.0	63.3	1.9	53.9	1.0
Race-ethnicity, %							< 0.001
White	74.5	2.6	82.7	1.9	87.8	1.2
Black	14.3	1.8	10.0	1.2	6.0	0.7
Mexican	4.1	0.4	2.6	0.3	1.7	0.1
Other	7.2	2.1	4.7	1.4	4.5	0.9
Education, %							< 0.001
Less than high school	59.3	3.1	44.1	2.9	35.6	1.9
High school	24.7	2.0	32.1	1.5	31.7	1.4
More than high school	16.0	2.5	23.8	2.4	32.7	1.7
Income, %							< 0.001
Less than $20,000	54.2	2.9	47.1	2.8	36.3	1.7
$20,000-34,999	17.9	2.0	21.7	2.0	28.7	1.3
$35,000 or more	27.8	2.7	31.2	2.4	35.0	1.9
BMI status, %							< 0.001
Underweight	3.3	0.9	2.3	0.7	1.7	0.3
Normal weight	32.3	1.9	35.8	2.1	35.6	1.7
Overweight	32.3	2.0	36.0	1.9	41.6	1.4
Obese	32.1	2.5	25.8	1.5	21.1	1.2
Employment, %							0.02
Working	1.5	0.8	0.8	0.4	2.9	0.6
Retired	67.3	2.3	68.8	2.3	71.1	1.3
Keeping house	26.0	2.4	27.6	2.3	23.6	1.3
School or laid off	5.2	1.3	2.7	0.8	2.4	0.4
Smoking, %							< 0.01
Current Smoker	19.2	2.4	16.0	1.6	14.0	1.0
Previous Smoker	34.4	2.6	36.7	2.2	43.1	1.4
Never Smoked	46.4	2.2	47.2	2.2	42.9	1.4
Food insufficiency, %							< 0.001
Secure	94.9	1.2	98.1	0.5	99.2	0.2
Insecure	5.1	1.2	1.9	0.5	0.8	0.2
Frailty Criteria							n/a
Slow Walking, % yes	74.1	2.3	35.7	1.9	0.0
Weakness, % yes	84.6	1.5	35.3	1.7	0.0
Exhaustion, % yes	29.9	2.2	29.2	1.0	0.0
Low Physical Activity, % yes	61.9	2.4	26.1	1.9	0.0