Table 2 Patient characteristics associated with methicillin-susceptible Staphylococcus aureus (MSSA) infections, non-multidrug resistant methicillin resistant S. aureus (nmMRSA) infections and multidrug resistant MRSA (mMRSA) infections, Auckland District Health Board, New Zealand, 2001-2011

Age, median, IQR^a

22 (6–50)

16 (3–47)

52 (31.5–71.5)

< 0.001

-

< 0.001

-

Male sex^b

8,028 (56)

1,005 (55)

69 (59)

0.34

1.19 (0.83–1.69)

0.23

0.85–1.04

Clinical syndrome^b

 Invasive

3,390 (24)

311 (17)

51 (44)

< 0.001

1.53 (1.35–1.74)

< 0.001

0.26 (0.18–0.39)

 Non-invasive

10,902 (76)

1,529 (83)

66 (56)

-

-

-

-

Place of acquisition^b

 CO

7,732 (54)

993 (54)

29 (25)

0.93

1.0 (0.91–1.11)

< 0.001

3.56 (2.32–5.47)

 HCA-CO

4,851 (34)

614 (33)

58 (50)

0.64

1.03 (0.93–1.14)

< 0.001

0.51 (0.35–0.74)

 HCA-HO

1,709 (12)

233 (13)

30 (25)

0.40

0.94 (0.81–1.08)

< 0.001

0.42 (0.27–0.65)

Ethnicity^{b, c}

 European

6,223 (44)

544 (30)

57 (49)

< 0.001

1.84 (1.65–2.04)

< 0.001

0.44 (0.30–0.64)

 Māori

2,845 (20)

349 (19)

17 (15)

0.37

1.06 (0.94–1.19)

0.27

1.37 (0.81–2.33)

 Pacific Peoples

3,942 (28)

832 (46)

28 (24)

< 0.001

0.41 (0.37–0.46)

< 0.001

2.92 (1.89–4.51)

 Other

1,210 (8)

103 (5)

14 (12)

< 0.001

1.56 (1.27–1.92)

0.013

0.44 (0.24–0.79)

NZDep band^b,d

 1–3

2,792 (21)

275 (16)

26 (25)

< 0.001

1.37 (1.20-1.57)

0.029

0.58 (0.37-0.92)

 4–7

4,864 (36)

546 (32)

33 (31)

< 0.001

1.21 (1.09-1.35)

1.0

1.02 (0.67-1.56)

 8–10

5,903 (44)

911 (53)

47 (44)

< 0.001

0.69 (0.63-0.77)

0.11

1.39 (0.94-2.07)