Table 1.

Relationship between baseline characteristics and hip fracture status or hemoglobin among non-Hispanic white adults age 65+ years, NHANES III follow-up

	Hip fracture				Hemoglobin (g/dL)
	Yes		No		< sex-specific median		>= sex-specific median
	n	Mean or %	n	Mean or %	n	Mean or %	n	Mean or %
Age (years)	239	75.4	1833	73.4*	905	74.5	1217	73*
Hemoglobin (g/dL)	239	13.8	1883	14*	905	12.9	1217	14.7*
Serum thyroid stim hormone (uU/mL)	223	2.7	1797	2.7	878	2.8	1142	2.6
Femur neck BMD (g/cm2)	216	0.600	1734	0.695*	822	0.673	1128	0.693*
Body mass index (height in cm2/weight in kg)	239	25.3	1881	26.9*	903	26.1	1217	27.1*
Times fallen in past year (n)	237	0.42	1875	0.41	900	0.42	1212	0.41
Time to complete five chair stands (seconds)	208	14.3	1660	13.3*	774	13.7	1094	13.2
Sex
Male	87	29.8	957	45.9*	461	43.6	583	44.8
Female	152	70.2	926	54.1	444	56.4	634	55.2
Iron or folate deficiency
Yes	65	27.9	378	20.3*	219	24.7	224	18.6*
No	168	72.1	1475	79.7	673	75.3	970	81.4
Inflammation
Yes	78	32.0†	557	29.8	319	34.8	316	26.9*
No	145	68	1217	70.2	543	65.2	819	73.1
Renal insufficiency
Yes	20	6.1†	131	4.9	103	7.8	48	3.2†*
No	210	93.9	1694	95.1	779	92.2	1125	96.8
Ever smoked
Yes	107	47.6	992	55.5*	436	48.6	663	58.7*
No	132	52.4	891	44.5	469	51.4	554	41.3
Drink 3+ units per drinking occasion
Yes	9	‡	96	5.4	42	5.3†	63	5.3†
No	223	95.8	1751	94.6	838	94.7	1136	94.7
Activity level compared to others of same age and sex
More	113	46	869	47	420	46.8	562	46.7
Less	28	12†	224	12	111	11.9	141	12.4
Same	90	42†	726	41	336	41.3	480	40.9
Self-rated health status
Poor/fair	85	37.4	713	40.1	327	38.4	471	40.7
Excellent/very good/good	154	62.6	1165	59.9	576	61.6	743	59.3
Self-reported diagnosed heart, lung, or non-skin cancer
Yes	104	44.1	847	43.4	405	43.3	546	43.6
No	134	55.9	1018	56.6	493	56.7	659	56.4

^*p < 0.05 based on linear regression (means) or chi-square (percents)

^†May be unreliable, relative standard error =30–39% or based on less than 12 degrees of freedom.

^‡Unreliable; relative standard error ≥ 40% or insufficient degrees of freedom