Table 2.

Risk factors associated with pressure ulcer incidence

Characteristic	% of total	No. of cases (%)*	Odds ratio (95% CI)	C‐statistic
Sex				0·547
Female	62·7	3486 (2·29)	Reference
Male	37·3	3019 (3·34)	1·47 (1·40, 1·55)
Race				0·522
White	79·6	5424 (2·81)	Reference
Black	13·7	856 (2·58)	0·92 (0·85, 0·99)
Other	6·7	225 (1·38)	0·48 (0·42, 0·55)
Age (years)				0·738
15–25	8·5	32 (0·16)	0·09 (0·06, 0·13)
25–35	14·8	64 (0·18)	0·10 (0·08, 0·13)
35–45	10·5	170 (0·67)	0·38 (0·32, 0·46)
45–55	12·5	522 (1·72)	Reference
55–65	15·0	968 (2·66)	1·56 (1·40, 1·73)
65–75	14·8	1248 (3·48)	2·05 (1·85, 2·28)
75–85	14·8	1884 (5·24)	3·15 (2·86, 3·48)
≥85	9·2	1617 (7·23)	4·44 (4·02, 4·91)
CCI				0·793
0	49·2	601 (0·50)	0·13 (0·12, 0·14)
1	20·3	917 (1·86)	0·49 (0·45, 0·54)
2	12·5	1132 (3·73)	Reference
3	7·2	1088 (6·21)	1·71 (1·57, 1·86)
4	4·4	913 (8·61)	2·43 (2·22, 2·66)
≥5	6·4	1854 (11·85)	3·47 (3·21, 3·75)
Body mass index (kg/m2)				0·624
Missing	12·8	605 (1·94)	0·48 (0·43, 0·52)
<19	3·3	796 (10·05)	2·69 (2·47, 2·93)
19–25	22·0	2128 (3·99)	Reference
25–30	29·2	1603 (2·26)	0·56 (0·52, 0·59)
≥30	32·8	1373 (1·73)	0·42 (0·40, 0·45)
Fiscal period				0·520
FY2009	51·4	3087 (2·48)	Reference
FY2010	48·7	3481 (2·89)	1·17 (1·12, 1·23)
Surgical DRG				0·568
No	1376 (1·65)	Reference
Yes	5129 (3·22)	1·99 (1·87, 2·11)
Admission type				0·622
Home	61·5	2796 (1·87)	Reference
Emergency	27·2	2516 (3·81)	2·07 (1·96, 2·19)
Transfer	6·8	1072 (6·48)	3·63 (3·37, 3·90)
Other	4·5	121 (1·10)	0·58 (0·49, 0·70)

CCI, Charlson Comorbidity Index; CI, confidence interval.

^*Denominators for percentages are the total number of patients with each characteristic.