Secondary Statistical Analyses Sample Clauses

Secondary Statistical Analyses. Most cases (70.1%) experienced one infection while relatively small percentages of cases experienced 2 to 5 infections over the duration of the study period (Figure 1). The most common site of MRSA infection was skin and soft tissue (n=232; 57.9%), followed by genitourinary tract (n=53; 13.2%), bloodstream and cardiovascular system (n=37; 9.2%), respiratory (n=32; 8.0%), bone and joint (n=22; 5.5%), surgical site (n=13; 3.2%), eye/ear/nose/throat/mouth (n=10; 2.5%), reproductive tract (n=1; 0.3%), and gastrointestinal tract (n=1; 0.3%) (Figure 2). Almost all of the MRSA infections were diagnosed in the outpatient setting (n=366; 91.3%) as opposed to the inpatient setting (n=35, 9%). There was no significant difference in frequency of infection by season (p=0.1343) (Table VIII). The number of days between vitamin D determination and positive MRSA culture ranged from 1669 days (approximately 4.57 years) before infection to 1360 days (3.72 years) after the infection with a median of 77 days prior to infection (Figure 3). Median vitamin D levels were approximately the same from 2007 to 2009, and then dropped significantly to 19 ng/mL in 2010 (p<0.0001) (Table IX). In this group of veterans, males were significantly older than females (p<0.0001), white subjects were significantly older than black subjects and subjects in the “other race” category (p<0.0001), and non-Hispanics were significantly older than Hispanics (p=0.0308) (Table X). BMI related inversely to age (p<0.0001). HIV positive individuals were significantly younger than HIV negative subjects (p<0.0001). Race was significantly associated with gender (p<0.0001), ethnicity (p<0.0001), and HIV status (p<0.0001) (Table XI). The other race category was comprised of the highest percentage of females (29.8%) and Hispanic subjects (7.0%). Of the black subjects, 23.2% were HIV positive, which was significantly more than in the white and other race categories (6.9% and 0.0%, respectively).