TABLE 1

Baseline characteristics and bacterial colonization by living environment

CharacteristicaNo. (%) with characteristic in study groupP value
Overall
population
(n = 67)
Nursing home
(n = 16)
Community
(n = 51)
Age (median yrs [IQR])72 (69, 79)78 (70, 89)71 (68, 76)0.04
Male34 (51)13 (81)21 (41)<0.01
Race or ethnicity0.31
    Asian2 (3)0 (0)2 (4)
    Black or African American15 (23)6 (38)9 (18)
    White46 (71)10 (63)36 (73)
    Multiracial2 (3)0 (0)2 (4)
Body mass index (median [IQR])27 (25, 31)29 (26, 34)27 (25, 30)0.25
Diabetes7 (11)7 (47)0 (0)<0.01
Indwelling medical device2 (3)2 (13)0 (0)0.05
Bathed or showered in past 12 h37 (56)3 (20)34 (67)<0.01
Colonized with Staphylococcus aureus
    Any body site20 (30)4 (25)16 (31)0.76
    Nose14 (22)3 (20)11 (22)1.00
        MRSA4 (6)1 (7)3 (6)1.00
        MSSA10 (15)2 (13)8 (16)1.00
    Throat11 (17)2 (15)9 (18)1.00
        MRSA2 (3)0 (0)3 (4)1.00
        MSSA9 (14)2 (15)7 (14)1.00
    Subclavian skin4 (7)0 (0)4 (9)0.57
        MRSA2 (3)0 (0)2 (4)1.00
        MSSA2 (3)0 (0)2 (4)1.00
    Femoral skin3 (5)1 (6)2 (4)1.00
        MRSA2 (3)1 (6)1 (2)0.44
        MSSA1 (2)0 (0)1 (2)1.00
Colonized with pathogenic GNR
    Any body site29 (43)9 (56)20 (39)0.23
    Nose19 (29)6 (40)13 (26)0.30
        Pseudomonas aeruginosa1 (2)1 (1)0 (0)0.23
        Acinetobacter spp.2 (3)1 (7)1 (2)0.41
        Enterobacteriaceae18 (28)6 (40)12 (24)0.23
    Throat16 (25)3 (23)13 (25)1.00
        Pseudomonas aeruginosa1 (2)1 (8)0 (0)0.20
        Acinetobacter spp.0 (0)0 (0)0 (0)
        Enterobacteriaceae16 (25)3 (23)13 (25)1.00
    Subclavian skin4 (7)2 (15)2 (4)0.20
        Pseudomonas aeruginosa1 (2)1 (8)0 (0)0.22
        Acinetobacter spp.0 (0)0 (0)0 (0)
        Enterobacteriaceae4 (7)2 (15)2 (4)0.20
    Femoral skin12 (18)7 (44)5 (10)<0.01
        Pseudomonas aeruginosa2 (3)2 (13)0 (0)0.06
        Acinetobacter spp.1 (2)1 (6)0 (0)0.25
        Enterobacteriaceae11 (17)6 (38)5 (10)0.02
  • a For GNR data, participants could be colonized with more than one Enterobacteriaceae species. Analysis was performed per participant. The three most common organisms from the Enterobacteriaceae family found at each body site were Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis. IQR, interquartile range; MRSA, methicillin-resistant S. aureus; MSSA, methicillin-sensitive S. aureus.