Table 1.

Demographics of TJA Patients With and Without IF

Demographics of TJA Patients With and Without IF
	No fall			Fall			P
	F	WF	(%)	F	WF	(%)
Discharges	1 078 804	5 268 757	99.2	9198	44 932	0.8	<.0001
Surgery type							<.0001
Primary hip	330 128	1 613 639	30.6	2755	13 476	30.0
Primary knee	668 015	3 259 890	61.9	5281	25 787	57.4
Revision hip	40 586	198 923	3.8	610	2973	6.6
Revision knee	40 075	196 305	3.7	552	2695	6.0
Age groups (y)							<.0001
0–44	42 032	204 999	3.9	299	1452	3.2
45–64	383 526	1 871 661	35.5	2885	14 072	31.3
65–74	358 384	1 749 292	33.2	2934	14 369	32.0
75+	294 848	1 442 738	27.4	3080	15 039	33.5
Sex							.03
Male	415 945	2 030 345	38.5	3646	17 829	39.7
Female	662 793	3 238 090	61.5	5551	27 099	60.3
Race							.07
White	983 737	4 810 167	91.3	8350	40 788	90.8
Black	51 224	247 866	4.7	459	2283	5.1
Hispanic	24 547	116 545	2.2	237	1118	2.5
Other	19 296	94 178	1.8	152	742	1.7
Insurance							<.0001
Medicare	633 356	3 094 112	58.9	5766	28 272	63.0
Medicaid	27 866	136 913	2.6	239	1189	2.6
Private/HMO	379 257	1 851 071	35.2	2875	13 937	31.0
Other	36 059	175 460	3.3	309	1490	3.3
Hospital size							<.0001
Small	163 722	749 589	14.2	1523	7132	15.9
Medium	270 612	1 312 353	24.9	2521	12 336	27.5
Large	643 798	3 203 638	60.8	5145	25 420	56.6
Hospital location							.03
Rural	143 161	722 089	13.7	1302	6523	14.5
Urban	934 971	4 543 491	86.3	7887	38 366	85.5
Teaching status							.003
Nonteaching	596 485	2 876 678	54.6	5239	25 218	56.2
Teaching	481 647	2 388 902	45.4	3950	19 670	43.8

F indicates frequency; WF, weighted frequency; HMO, health maintenance organization.