Table 4

Laboratory test values at the time of admission

TotalAsthmaCOPDSmoking
YesNoP valueYesNoP valueYes—current
(in past 30 days)
Yes—pastNeverUnknownP value
N=1391n=182n=1209n=143n=1248n=102n=404n=777n=108
White blood cell count
(×1000)
6.78
(5.11 to 9.23)
6.96
(4.95 to 9.04)
6.76
(5.13 to 9.23)
0.946.34
(4.84 to 8.38)
6.82
(5.15 to 9.24)
0.0576.81
(5.21 to 9.05)
6.80
(5.11 to 9.14)
6.71
(5.07 to 9.25)
7.27
(5.31 to 9.32)
0.74
Absolute lymphocyte count (K/μL)0.98
(0.67 to 1.41)
1.06
(0.74 to 1.54)
0.96
(0.66 to 1.39)
0.0220.82
(0.53 to 1.32)
1.00
(0.69 to 1.42)
0.0011.10
(0.75 to 1.87)
0.89
(0.60 to 1.28)
1.03
(0.72 to 1.42)
0.95
(0.66 to 1.29)
<0.001
Haemoglobin (g/dL)13.3
(12.0 to 14.5)
13.3
(12.1 to 14.6)
13.3
(12.0 to 14.5)
0.9212.6
(10.8 to 13.9)
13.4
(12.1 to 14.6)
<0.00112.9
(11.5 to 14.3)
13.2
(11.5 to 14.7)
13.3
(12.1 to 14.4)
14.0
(12.6 to 15.1)
0.002
Platelets (K/μL)203
(156 to 264)
201
(156 to 257)
203
(156 to 264)
0.81189
(153 to 236)
207
(157 to 265)
0.034208
(154 to 268)
193
(148 to 265)
207
(159 to 264)
199
(162 to 260)
0.18
Lactate (mmol/L)1.5
(1.1 to 2.1)
1.4
(1.0 to 2.0)
1.5
(1.2 to 2.1)
0.0801.4
(1.0 to 1.7)
1.5
(1.2 to 2.1)
0.0071.6
(1.1 to 2.7)
1.5
(1.2 to 2.0)
1.5
(1.1 to 2.1)
1.7
(1.1 to 2.2)
0.37
Anion gap (mmol/L)15
(14 to 17)
15
(14 to 16)
15
(14 to 17)
0.03915
(13 to 17)
15
(14 to 17)
0.00214
(13 to 17)
15
(14 to 17)
15
(14 to 17)
16
(14 to 18)
0.008
BUN (mg/dL)14
(10 to 22)
12
(9 to 17)
15
(10 to 23)
<0.00121
(16 to 33)
14
(9 to 21)
<0.00115
(11 to 22)
19
(13 to 30)
12
(9 to 19)
13
(9 to 20)
<0.001
Creatinine (mg/dL)0.95
(0.78 to 1.28)
0.86
(0.72 to 1.05)
0.97
(0.79 to 1.30)
<0.0011.13
(0.90 to 1.65)
0.93
(0.77 to 1.22)
<0.0010.98
(0.79 to 1.28)
1.07
(0.86 to 1.56)
0.90
(0.73 to 1.13)
0.91
(0.79 to 1.25)
<0.001
Glucose (mg/dL)124
(106 to 161)
118
(103 to 165)
125
(106 to 161)
0.23117
(103 to 149)
126
(106 to 162)
0.013115
(99 to 145)
127
(107 to 163)
124
(106 to 159)
129
(109 to 191)
0.021
Haemoglobin A1C (%)6.5
(6.0 to 8.4)
6.8
(5.8 to 8.4)
6.5
(6.0 to 8.4)
0.716.9
(6.2 to 9.0)
6.5
(6.0 to 8.4)
0.426.8
(6.0 to 8.4)
6.5
(6.0 to 8.4)
6.5
(6.0 to 8.3)
6.8
(5.9 to 9.9)
0.96
LDH (U/L)314
(242 to 419)
305
(231 to 393)
315
(243 to 422)
0.24288
(214 to 370)
318
(245 to 427)
<0.001262
(212 to 361)
312
(240 to 399)
315
(244 to 423)
381
(284 to 520)
<0.001
Ferritin (μg/L)512
(242 to 1027)
408
(189 to 719)
546
(256 to 1058)
<0.001296
(150 to 793)
540
(260 to 1048)
<0.001330
(110 to 1047)
552
(237 to 1075)
496
(257 to 967)
682
(395 to 1205)
0.002
CRP (mg/L)72.6
(30.8 to 143.4)
63.0
(28.1 to 125.0)
73.8
(32.4 to 144.3)
0.02556.4
(20.8 to 113.7)
74.1
(32.5 to 145.3)
0.00342.5
(9.3 to 117.5)
71.8
(32.5 to 140.1)
74.5
(33.2 to 143.4)
105.9
(36.6 to 155.6)
<0.001
ESR (mm/hour)39
(23 to 60)
36
(21 to 54)
39
(23 to 61)
0.08637
(22 to 54)
39
(23 to 60)
0.6731
(13 to 54)
38
(25 to 59)
39
(23 to 61)
44
(28 to 61)
0.010
Procalcitonin (ng/mL)0.15
(0.09 to 0.30)
0.13
(0.07 to 0.20)
0.15
(0.09 to 0.34)
<0.0010.17
(0.09 to 0.29)
0.14
(0.09 to 0.30)
0.460.11
(0.06 to 0.31)
0.17
(0.10 to 0.35)
0.13
(0.09 to 0.26)
0.18
(0.09 to 0.36)
0.001
IL-6 (pg/mL)26.6
(12.9 to 57.6)
17.6
(6.9 to 42.2)
28.6
(14.3 to 63.6)
0.00816.9
(14.5 to 44)
28.6
(12.6 to 60.6)
0.1922.3
(11.6 to 77.2)
27.1
(12.2 to 63.2)
25.4
(13.3 to 54.8)
35.4
(17.3 to 139.25)
0.59
Troponin (ng/L)11
(0 to 31)
8
(0 to 17)
12
(0 to 33)
<0.00127
(16 to 56)
10
(0 to 25)
<0.00112
(0 to 36)
22
(10 to 44)
8
(0 to 20)
10
(0 to 24)
<0.001
D-dimer (ng/mL)1020
(658 to 1854)
874
(592 to 1440)
1059
(678 to 1917)
0.0051400
(812 to 2334)
987
(643 to 1770)
<0.001868
(473 to 1514)
1172
(709 to 1925)
981
(627 to 1767)
1224
(773 to 2209)
0.008
NT-proBNP (pg/mL)259
(68 to 1190)
191
(38 to 880)
267
(70 to 1233)
0.37598
(230 to 2349)
203
(57 to 1005)
<0.001350
(112 to 1745)
503
(142 to 2469)
143
(47 to 562)
207
(69 to 1766)
<0.001
  • Median and IQR are reported. P values reflect between-group or among-group comparisons using the Wilcoxon rank-sum test (for asthma and COPD) or the Kruskal-Wallis test (for smoking).

  • COPD, chronic obstructive pulmonary disease; IL-6, interleukin-6.