TABLE 2.
Patient Demographics: THA for femoral neck fracture by arthroplasty volume quartile in New York State from 2000–2010
| Variable mean or % (SE*) | 1ST (Top) Quartile N=333 | 2nd Quartile N=899 | 3rd Quartile N=905 | 4TH (Bottom) Quartile N=1849 | p-values | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall | 1 vs 2 | 1 vs 3 | 1 vs 4 | 2 vs 3 | 2 vs 4 | 3 vs 4 | |||||
| Age (years) | 77.42 (0.97) | 80.74 (1.06) | 78.04 (0.48) | 79.34 (0.34) | 0.0761 | 0.0207 | 0.5682 | 0.0610 | 0.0199 | 0.2076 | 0.0251 |
| Race (%)** | N=210 | N=865 | N=823 | N=1703 | |||||||
| Black | 3(1.91) | 2(0.98) | 3(1.05) | 6(1.66) | 0.1831 | 0.3857 | 0.9355 | 0.3634 | 0.3294 | 0.0485 | 0.1462 |
| Ethnicity N(%)** | N=247 | N=874 | N=822 | N=1708 | |||||||
| Hispanic | 8(1.7) | 0.5(0.3) | 3(1.0) | 3(0.7) | 0.0175 | 0.0056 | 0.2861 | 0.2953 | 0.0080 | 0.0038 | 0.8905 |
| Male (%) | 25(2.02) | 24 (2.40) | 27 (1.47) | 29 (1.15) | 0.0421 | 0.7312 | 0.3489 | 0.0641 | 0.1451 | 0.0105 | 0.2700 |
| Time to surgery (days) | 1.40 (0.16) | 1.85 (0.10) | 2.03 (0.16) | 2.30 (010) | 0.0265 | 0.0193 | 0.0063 | <.0001 | 0.3501 | 0.0024 | 0.1733 |
| Length of Stay | 7.39 (0.35) | 7.38 (0.47) | 8.05 (0.31) | 9.06 (0.24) | 0.0033 | 0.9843 | 0.1540 | <.0001 | 0.2262 | 0.0014 | 0.0107 |
| Total cost ($) | 62898 (12658) | 31327 (3696.67) | 46941 (4431.27) | 41464 (2481.38) | 0.1815 | 0.0167 | 0.2341 | 0.0966 | 0.0068 | 0.0228 | 0.2809 |
| Mean Charlson Comorbidity Index | 0.72 (0.09) | 0.93 (0.04) | 0.96 (0.05) | 0.93 (0.03) | 0.5808 | 0.0350 | 0.0240 | 0.0317 | 0.7310 | 0.9340 | 0.6529 |
| Comorbidities (% Yes) | |||||||||||
| Acute Myocardial Infarction (MI) | 5 (0.69) | 8(0.95) | 8(0.87) | 6(0.65) | 0.0626 | 0.0188 | 0.0360 | 0.3360 | 0.1765 | 0.1674 | 0.1888 |
| Congestive Heart | 8 (2.12) | 15 (1.93) | 11 (1.19) | 14 (0.96) | 0.0728 | 0.0468 | 0.3071 | 0.0537 | 0.0962 | 0.6766 | 0.0825 |
| Peripheral Vascular Disease | 2 (0.45) | 3 (0.64) | 5 (0.54) | 3 (0.48) | 0.0027 | 0.0497 | 0.0003 | 0.0352 | 0.1149 | 0.9624 | 0.0499 |
| Stroke | 3 (0.99) | 5 ((1.33) | 6 (0.78) | 5 (0.56) | 0.2761 | 0.2154 | 0.0517 | 0.0903 | 0.5547 | 0.8114 | 0.5216 |
| Dementia | 2 (1.93) | 3 (0.67) | 3 (0.78) | 4 (0.71) | 0.5183 | 0.7881 | 0.6990 | 0.4689 | 0.7605 | 0.1879 | 0.3512 |
| COPD | 14 (0.70) | 18 (1.17) | 18 (1.40) | 19 (1.06) | <.0001 | 0.0015 | 0.0051 | <.0001 | 0.9970 | 0.4949 | 0.5381 |
| Rheumatoid Arthritis | 7 (1.37) | 4 (0.68) | 4 (0.75) | 3 (0.46) | 0.0132 | 0.0266 | 0.0181 | 0.0013 | 0.7234 | 0.3407 | 0.6390 |
| Peptic Ulcer Disease | 2 (0.46) | 0.6(0.17) | 1 (0.32) | 1(0.28) | 0.0046 | 0.0004 | 0.0782 | 0.0752 | 0.1020 | 0.0457 | 0.8429 |
| Mild liver disease | 0.6(0.60) | 0.4(0.26) | 0.6(0.28) | 0.6(0.18) | 0.9767 | 0.7345 | 0.9209 | 0.9897 | 0.7808 | 0.6599 | 0.9020 |
| Diabetes | 8 (0.84) | 12 (1.19) | 16 (1.32) | 16 (0.90) | <.0001 | 0.0113 | <.0001 | <.0001 | 0.0338 | 0.0202 | 0.9143 |
| Diabetes with complications | 2(0.37) | 2(0.36) | 1(0.30) | 1 (0.26) | 0.7749 | 0.9146 | 0.4001 | 0.9274 | 0.3347 | 0.8276 | 0.3878 |
| Hemiplegia/Paraplegia‡ | --- | 0.1(0.08) | 0.1(0.11) | 0.2(0.09) | 0.8247 | 0.8255 | 0.5567 | 0.7305 | |||
| Renal Disease | 4(0.79) | 5(1.39) | 6(0.95) | 5(0.56) | 0.5124 | 0.6571 | 0.1330 | 0.3319 | 0.8463 | 0.5043 | 0.4102 |
| Cancer | 4(1.73) | 2(0.36) | 3(053) | 2(0.28) | 0.1023 | 0.0640 | 0.3182 | 0.0472 | 0.1631 | 0.9137 | 0.0970 |
| Moderate/Severe Liver Disease‡ | --- | 0.1 (0.08) | 0.6 (0.55) | 0.3(0.27) | 0.1525 | 0.0810 | 0.2781 | 0.2123 | |||
| Metastatic Cancer | 0.3(0.30) | 2(1.56) | 0.7(0.66) | 0.7(070) | 0.0212 | 0.1232 | 0.5050 | 0.4394 | 0.1192 | 0.0129 | 0.9227 |
*
Robust Standard Error Estimate
**
other or missing removed from analysis
‡
Q1 (presence of 0 cell) and Q2 combined to compare to Q3 and Q4