|
0–4 yr.
n=310
|
5–17 yr.
n=59
|
18–59 yr.
n=76
|
≥60 yr.
n=152
|
P-value
|
Laboratory findings |
|
|
|
|
|
White blood cell count, ×109 per L |
7.98 (6–10.8) |
8.0 (6.4–10.4) |
7.3 (5.5–10.0) |
7.5 (5.9–10.7) |
0.485 |
<4
|
6/280 (2.1%)
|
/49 (0%)
|
7/71 (9.9%)
|
10/145 (6.9%)
|
0.037
|
4–10
|
189/280 (67.5%)
|
35/49 (71.4%)
|
47/71 (66.2%)
|
92/145 (63.4%)
|
|
≥10
|
85/280 (30.4%)
|
14/49 (28.6%)
|
17/71 (23.9%)
|
43/145 (29.7%)
|
|
Lymphocyte count, × 109 per L |
3 (2–4.4) |
2.05 (1.225–2.875) |
1.4
(0.9–2.15) |
1.1 (0.7–1.7) |
<0.001 |
<1000
|
14/277 (5.1%)
|
8/48 (16.7%)
|
19/68 (27.9%)
|
54/130 (41.5%)
|
<0.001
|
Neutrophil proportion, % |
49 (32.0–62.5) |
64.9 (58.1–74.0) |
72.8
(57.3–83.3) |
76.5 (67.6–84.3) |
<0.001 |
<50
|
138/271 (50.9%)
|
7/49 (14.3%)
|
11/70 (15.7%)
|
5/139 (3.6%)
|
<0.001
|
50%–69%
|
92/271 (33.9%)
|
24/49 (49%)
|
19/70 (27.1%)
|
35/139 (25.2%)
|
|
≥70%
|
41/271 (15.1%)
|
18/49 (36.7%)
|
40/70 (57.1%)
|
99/139 (71.2%)
|
|
Platelet count, × 109 per L |
294 (225–368.5) |
292 (225–355.5) |
200
(166.25–260) |
197 (154–246) |
<0.001 |
<100
|
1/285 (0.4%)
|
/51 (0%)
|
4/69 (5.8%)
|
10/154 (6.5%)
|
<0.001
|
Creatinine, μmol/L |
22 (18.6–26.9) |
36.9 (29.7–39.8) |
60 (51–78) |
69.5 (56.5–87.6) |
<0.001 |
>133
|
/98 (0%)
|
/16 (0%)
|
/25 (0%)
|
7/94 (7.4%)
|
0.02
|
Blood urea nitrogen, mmol/L |
2.8 (2.1–3.625) |
2.7 (2.3–4) |
4.6
(2.95–6.025) |
5.1 (3.9–7.55) |
<0.001 |
≥7.14
|
2/101 (2%)
|
1/15 (6.7%)
|
2/26 (7.7%)
|
27/90 (30%)
|
<0.001
|
Alanine aminotransferase, U/L |
20 (14–28) |
13 (10–37.5) |
22
(11.5–36.5) |
16 (11–26) |
0.174 |
Aspartate aminotransferase, U/L |
34.5 (28.75–44) |
27 (20–31.5) |
24
(17–34) |
21 (17–32.75) |
<0.001 |
>40
|
37/106 (34.9%)
|
2/17 (11.8%)
|
4/26 (15.4%)
|
12/92 (13%)
|
0.001
|
Creatine kinase, U/L |
77 (52.8–119.0) |
81 (50.0–105.3) |
78
(55.0–131.8) |
77 (45.0–134.0) |
0.951 |
Creatine kinase MB fraction, U/L |
21 (15.5–29) |
19.5 (14–21) |
10.5
(2.8–17.3) |
10 (5.3–14.0) |
<0.001 |
>25
|
31/102 (30.4%)
|
3/17 (17.6%)
|
2/19 (10.5%)
|
2/79 (2.5%)
|
<0.001
|
Sodium, mmol/L |
137.5 (136–139) |
139 (136–139.1) |
138 (135.5–142) |
138 (135–140) |
0.619 |
Erythrocyte sedimentation rate, mm/hour |
21 (15.5–29.3) |
42 (14–59) |
24.5 (15.8–48.8) |
35 (25–60) |
0.267 |
C-reactive protein, mg/L |
8 (6–8) |
9 (8–80) |
18.55 (12.25–120.175) |
26 (8.5–81.8) |
<0.001 |
≥10
|
13/56 (23.2%)
|
3/7 (42.9%)
|
14/16 (87.5%)
|
39/53 (73.6%)
|
<0.001
|
Procalcitonin, ng/mL |
0.15 (0.1–0.39) |
0.39 (0.25–0.64) |
0.055
(0.02–0.1675) |
0.09 (0.05–0.31) |
0.019 |
The arterial partial pressure of oxygen |
97 (77.25–105.25) |
96
(91–98) |
82 (65–98) |
92 (74–96) |
0.099 |
Saturation of arterial blood oxygen, % |
97 (92–99) |
94.5 (89–97) |
94 (88–99) |
94 (88–98) |
0.135 |
<90
|
6/35 (17.1%)
|
2/8 (25%)
|
7/23 (30.4%)
|
33/105 (31.4%)
|
0.346
|
Radiographic findings |
|
|
|
|
|
Monolateral involvement of chest radiographs |
40 (12.9%) |
12 (20.3%) |
16 (21.1%) |
46 (30.3%) |
<0.001 |
bilateral involvement of chest radiographs |
32 (10.3%) |
4 (6.8%) |
19 (25%) |
44 (28.9%) |
|