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The relationships between the various pre-operative factors and length of stay were studied separately using either Student\u2019s t-test or Pearson\u2019s correlation, and then subjected to multiple linear regression analysis. <\/jats:p><jats:p> The mean length of stay was 8.1 days (median 7; 3 to 58). After adjusting for the effects of other pre-operative factors, younger age, male gender, higher combined Harris hip function and activity score, higher general health perception dimension of the Short-Form 36 score, and non-steroidal anti-inflammatory drug use were all found to be significantly associated with a reduced length of stay. <\/jats:p>","DOI":"10.1302\/0301-620x.91b4.21505","type":"journal-article","created":{"date-parts":[[2009,3,31]],"date-time":"2009-03-31T21:53:04Z","timestamp":1238536384000},"page":"434-440","source":"Crossref","is-referenced-by-count":60,"title":["The influence of pre-operative factors on the length of in-patient stay following primary total hip replacement for osteoarthritis"],"prefix":"10.1302","volume":"91-B","author":[{"given":"G. F.","family":"Dall","sequence":"first","affiliation":[{"name":"New Royal Infirmary of Edinburgh, 51 Little France Crescent, Edinburgh EH16 4SA, UK."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"N. E.","family":"Ohly","sequence":"additional","affiliation":[{"name":"New Royal Infirmary of Edinburgh, 51 Little France Crescent, Edinburgh EH16 4SA, UK."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. A.","family":"Ballantyne","sequence":"additional","affiliation":[{"name":"Victoria Hospital, Hayfield Road, Kirkcaldy, Fife KY2 5AH, UK."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I. J.","family":"Brenkel","sequence":"additional","affiliation":[{"name":"Victoria Hospital, Hayfield Road, Kirkcaldy, Fife KY2 5AH, UK."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"42","reference":[{"key":"R1","doi-asserted-by":"crossref","unstructured":"Zhan C, Kaczmarek R, Loyo-Berrios N, Sangl J, Bright RA. Incidence and short-term outcomes of primary and revision hip replacement in the United States. 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