title: Unit-level time trends and seasonality in the rate of hospital-acquired pressure ulcers in US acute care hospitals.
abstract: This is a longitudinal study of the trend and seasonality in unit-level hospital-acquired pressure ulcer (HAPU) rates from 2004 to 2011, for 5447 acute care nursing units in 733 US hospitals. Unit-level HAPU rates decreased significantly during 2004-2007 (OR = 0.91, 95% CI [0.90, 0.91]) and the decreasing trend was much stronger during 2008-2011 (OR = 0.84 [0.83, 0.85]). Seasonal variations in HAPU rates were strong and consistent during 2004-2008, with the highest HAPU rate in Quarter 1 (Jan-Mar) and the lowest rate in Quarter 3 (Jul-Sep). During 2009-2011, the magnitude of this seasonality was greatly reduced, and only HAPU rate in Quarter 1 remained significantly higher than HAPU rates in other quarters.
authors: Department of Biostatistics, University of Kansas Medical Center, 3901 Rainbow Blvd, Kansas City, KS 66160, USA.
authors: Jianghua
authors: J
authors: He
authors: Vincent S
authors: VS
authors: Staggs
authors: Sandra
authors: S
authors: Bergquist-Beringer
authors: Nancy
authors: N
authors: Dunton
mesh_terms: D001499:Bayes Theorem; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D003668:Pressure Ulcer / Q000453:epidemiology* / Q000451:nursing; D012044:Regression Analysis; D012621:Seasons; D014481:United States / Q000453:epidemiology