| |
MRSA pneumonia
|
Non-MRSA pneumonia
|
p-value
|
|---|
|
n (%)
|
n (%)
|
|---|
|
Sex
| | | | |
0.943
|
|
Male
|
2059
|
(66.4)
|
8186
|
(66.4)
| |
|
Female
|
1043
|
(33.6)
|
4134
|
(33.6)
| |
|
Age (years, mean ± SD)
|
79.6 ± 10.7
|
79.5 ± 10.5
|
0.698
|
|
Body mass index (kg/m2)
| | | | |
< 0.001
|
|
< 18.5
|
1388
|
(44.7)
|
3539
|
(28.7)
| |
|
18.5–24.9
|
1136
|
(36.6)
|
5899
|
(47.9)
| |
|
25–29.9
|
116
|
(3.7)
|
1147
|
(9.3)
| |
|
≥ 30
|
28
|
(0.9)
|
199
|
(1.6)
| |
|
Missing
|
434
|
(14.0)
|
1536
|
(12.5)
| |
|
ADL score (Barthel Index)
| | | | |
< 0.001
|
|
85–100
|
474
|
(15.3)
|
4144
|
(33.4)
| |
|
60–80
|
159
|
(5.1)
|
991
|
(8.0)
| |
|
0–55
|
2024
|
(65.2)
|
5503
|
(44.7)
| |
|
Missing
|
445
|
(14.3)
|
1712
|
(13.9)
| |
|
Smoking history
| | | | |
0.003
|
|
Yes
|
1226
|
(39.5)
|
5239
|
(42.5)
| |
|
No
|
1876
|
(60.5)
|
7086
|
(57.5)
| |
|
Hugh-Jones grade
| | | | |
< 0.001
|
|
I
|
132
|
(4.3)
|
1604
|
(13.0)
| |
|
II
|
193
|
(6.2)
|
1774
|
(14.4)
| |
|
III
|
231
|
(7.5)
|
1411
|
(11.5)
| |
|
IV
|
435
|
(14.0)
|
2444
|
(19.8)
| |
|
V
|
948
|
(30.6)
|
2375
|
(19.3)
| |
|
Missing
|
1163
|
(37.5)
|
2712
|
(22.0)
| |
|
A-DROP score
| | | | |
< 0.001
|
|
0
|
162
|
(5.2)
|
1089
|
(8.8)
| |
|
1
|
639
|
(20.6)
|
3882
|
(31.5)
| |
|
2
|
870
|
(28.0)
|
3871
|
(31.4)
| |
|
3
|
701
|
(22.6)
|
2099
|
(17.0)
| |
|
4
|
410
|
(13.2)
|
791
|
(6.4)
| |
|
5
|
218
|
(7.0)
|
316
|
(2.6)
| |
|
Missing
|
102
|
(3.3)
|
272
|
(2.2)
| |
|
Dehydration
| | | | |
< 0.001
|
|
Yes
|
1788
|
(55.6)
|
5443
|
(44.2)
| |
|
No
|
1288
|
(41.5)
|
6779
|
(55.0)
| |
|
Missing
|
26
|
(0.8)
|
98
|
(0.8)
| |
|
Respiratory failure
| | | | |
< 0.001
|
|
Yes
|
1612
|
(52.0)
|
4591
|
(37.3)
| |
|
No
|
1468
|
(47.3)
|
7642
|
(62.0)
| |
|
Missing
|
22
|
(0.7)
|
87
|
(0.7)
| |
|
Orientation disturbance
| | | | |
< 0.001
|
|
Yes
|
941
|
(30.3)
|
1934
|
(15.7)
| |
|
No
|
2100
|
(67.7)
|
10,285
|
(83.5)
| |
|
Missing
|
61
|
(2.0)
|
101
|
(0.8)
| |
|
Systolic blood pressure
| | | | |
< 0.001
|
|
< 90 mmHg
|
502
|
(16.2)
|
1013
|
(8.2)
| |
|
≥ 90 mmHg
|
2581
|
(83.2)
|
11,243
|
(91.3)
| |
|
Missing
|
19
|
(0.6)
|
64
|
(0.5)
| |
|
CRP ≥ 20 mg/mL or infiltration covering at least two-thirds of one lung on chest radiography
| | | | |
< 0.001
|
|
Yes
|
477
|
(15.4)
|
1369
|
(11.1)
| |
|
No
|
1030
|
(33.2)
|
5185
|
(42.1)
| |
|
Missing
|
1595
|
(51.4)
|
5766
|
(46.8)
| |
|
Mechanical ventilation at admission
| | | | |
< 0.001
|
|
Yes
|
263
|
(8.5)
|
408
|
(3.3)
| |
|
No
|
2839
|
(91.5)
|
11,912
|
(96.7)
| |
|
ICU admission
| | | | |
< 0.001
|
|
Yes
|
101
|
(3.3)
|
157
|
(1.3)
| |
|
No
|
3001
|
(96.7)
|
12,163
|
(98.7)
| |
|
Haemodialysis
| | | | |
< 0.001
|
|
Yes
|
115
|
(3.7)
|
216
|
(1.8)
| |
|
No
|
2987
|
(96.3)
|
12,104
|
(98.2)
| |
|
Emergency transport
| | | | |
< 0.001
|
|
Yes
|
1061
|
(34.2)
|
3524
|
(28.6)
| |
|
No
|
2401
|
(65.8)
|
8796
|
(71.4)
| |
|
COPD
| | | | |
0.003
|
|
Yes
|
328
|
(10.6)
|
1548
|
(12.6)
| |
|
No
|
2774
|
(89.4)
|
10,772
|
(87.4)
| |
|
Interstitial lung disease
| | | | |
0.231
|
|
Yes
|
88
|
(2.8)
|
404
|
(3.3)
| |
|
No
|
3014
|
(97.2)
|
11,916
|
(96.7)
| |
|
Aspiration pneumonia
| | | | |
< 0.001
|
|
Yes
|
229
|
(7.4)
|
206
|
(1.7)
| |
|
No
|
2873
|
(92.6)
|
12,114
|
(98.3)
| |
|
Pseudomonas aeruginosa
| | | | |
0.635
|
|
Pneumonia
|
|
Yes
|
67
|
(2.2)
|
287
|
(2.3)
| |
|
No
|
3035
|
(97.8)
|
12,033
|
(97.7)
| |
|
Diabetes
| | | | |
0.999
|
|
Yes
|
571
|
(18.4)
|
2268
|
(18.4)
| |
|
No
|
2531
|
(81.6)
|
10,052
|
(81.6)
| |
- MRSA, methicillin-resistant Staphylococcus aureus; ADL, activities of daily living; A-DROP, Age, Dehydration, Respiratory Failure, Orientation Disturbance and Blood Pressure; CRP, C-reactive protein; ICU, intensive care unit; COPD; chronic obstructive pulmonary disease
