Table 1—

Baseline characteristics for all patients, subdivided by cardiac-specific troponin T (cTnT) measurement, number of patients, adjusted odds ratio (OR) for cTnT measurement and corresponding p-value

Baseline characteristiccTnTOR (95% CI)p-value
MeasuredNot measured
Subjects396501
Age and sex
 40–59 yrs61 (15)100 (20)
 60–69 yrs77 (19)112 (22)
 70–79 yrs142 (36)186 (37)
 ≥80 yrs116 (29)103 (21)
 Age + 10 yrs1.02 (0.89–1.18)0.77
 Female197 (50)259 (52)0.95 (0.72–1.27)0.75
Laboratory values#
 Creatinine ≥120 μmol·L−148 (12)49 (10)
 Anaemia133 (34)154 (31)
 WBC count ≥10×106 cells·mL−1224 (57)253 (51)
 CRP ≥50 mg·L−1197 (59)264 (53)
Clinical data
 FEV1 <30% pred42 (11)92 (18)0.59 (0.38–0.91)0.016
 Cardiac frequency ≥120 beats·min−163 (16)98 (20)0.79 (0.55–1.15)0.23
 Respiratory frequency ≥30 breaths·min−159 (15)57 (11)1.38 (0.91–2.10)0.13
 Oxygen saturation <80%16 (4)29 (6)0.78 (0.39–1.56)0.48
 Supplemental oxygen142 (36)139 (28)1.37 (1.00–1.86)0.048
PCO2 >6.5 kPa69 (17)103 (21)0.81 (0.55–1.19)0.28
 BMI <20 kg·m−264 (16)102 (20)1.02 (0.69–1.51)0.93
 Atrial fibrillation46 (12)45 (9)1.10 (0.68–1.76)0.71
Chest radiograph
 Cardiomegaly158 (40)160 (32)0.99 (0.72–1.37)0.97
 Congestion, any sign121 (31)101 (20)1.69 (1.20–2.37)0.003
 Hyperinflation116 (29)118 (37)0.77 (0.56–1.06)0.11
Medical history
 Ischaemic heart disease150 (38)107 (21)1.73 (1.23–2.44)0.002
 Heart failure47 (12)42 (8)0.92 (0.56–1.52)0.76
 Diabetes61 (15)48 (10)1.39 (0.90–2.15)0.14
 Thromboembolism11 (3)11 (2)1.19 (0.48–2.97)0.71
 Cancer55 (14)55 (12)1.12 (0.74–1.71)0.59
 Never-smoker30 (8)25 (5)1.34 (0.75–2.42)0.32
Treatment
 Statins66 (17)50 (10)1.16 (.074–1.80)0.53
 Aspirin128 (32)99 (20)1.54 (1.08–2.18)0.016
 Inhaled corticosteroids236 (60)295 (59)1.09 (0.82–1.46)0.56
  • Data are presented as n (%), unless otherwise stated. CI: confidence interval; WBC: white blood cell; CRP: C-reactive protein; FEV1: forced expiratory volume in one second; % pred: % predicted; PCO2: partial pressure of carbon dioxide; BMI: body mass index. #: not included in the logistic regression model forming the basis for the exposure propensity score calculation; : haemoglobin concentration <12 mg·dL−1 for females and <13 mg·dL−1 for males.