Table 2 Continuous variables as number of subjects per quartile with elevated cTnT.
From: Determinants of cardiac troponin T elevation in COPD exacerbation – a cross-sectional study
Quartiles | |||||
|---|---|---|---|---|---|
Characteristic | First | Second | Third | Fourth | p |
Age, years | < 64 | 64–73 | 74–80 | > 80 | |
n (%) | 18 (17) | 27 (25) | 37 (32) | 38 (34) | < 0.001 |
Heart rate, beats/minute | < 84 | 84–97 | 98–110 | > 110 | |
n (%) | 16 (15) | 29 (29) | 31 (29) | 40 (40) | 0.001 |
CIIS, points | < 6 | 6–13 | 14–22 | > 22 | |
n (%) | 17 (15) | 22 (23) | 34 (36) | 43 (40) | < 0.001 |
Systolic blood pressure, mmHg | < 120 | 120–139 | 140–157 | > 157 | |
n (%) | 45 (41) | 24 (24) | 20 (21) | 22 (20) | 0.001 |
Diastolic blood pressure, mmHg | < 65 | 65–76 | 77–88 | > 88 | |
n (%) | 44 (37) | 26 (27) | 14(15) | 26 (25) | 0.002 |
Temperature, °C | < 36.7 | 36.7–37.4 | 37.5–38.1 | > 38.1 | |
n (%) | 26 (22) | 37 (35) | 18 (23) | 27 (27) | 0.9 |
Respiratory rate, breaths/min | < 21 | 21–25 | 26–30 | > 30 | |
n (%) | 10 (26) | 11 (27) | 9 (17) | 20 (40) | 0.04 |
Oxygen saturation, % | < 88 | 88–92 | 93–95 | >95 | |
n (%) | 25 (32) | 18 (25) | 21 (22) | 20 (29) | 0.06 |
pCO 2 , kPa | < 4.8 | 4.8–5.5 | 5.6–6.7 | > 6.7 | |
n (%) | 27 (26) | 22 (22) | 21 (24) | 32 (36) | 0.04 |
pH | < 7.38 | 7.38–7.42 | 7.43–7.46 | > 7.46 | |
n (%) | 42 (36) | 13 (17) | 26 (23) | 21 (30) | 0.10 |
FEV 1 , % of predicted | < 31 | 31–42 | 43–58 | > 58 | |
n (%) | 24 (33) | 26 (33) | 22 (26) | 19 (20) | 0.06 |
Creatinine, μmol/l | < 62 | 62–76 | 77–97 | > 97 | |
n (%) | 19 (18) | 16 (16) | 29 (30) | 56 (44) | < 0.001 |
CRP, mg/l | < 13 | 13–56 | 57–163 | > 163 | |
n (%) | 21 (20) | 24 (24) | 27 (24) | 47 (43) | 0.001 |
Neutrophil count, 10 6 /ml | < 5.8 | 5.8–8.3 | 8.4–11.7 | > 11.7 | |
n (%) | 14 (17) | 26 (21) | 30 (27) | 50 (41) | < 0.001 |
Non-neutrophil count, 10 6 /ml | < 1.5 | 1.5–2 | 2.1–2.8 | > 2.8 | |
n (%) | 40 (34) | 19 (26) | 21 (23) | 23 (26) | 0.11 |
Hemoglobin, mg/dl | < 11.8 | 11.8–13.1 | 13.2–14.2 | > 14.2 | |
n (%) | 49 (40) | 33 (31) | 16 (13) | 22 (24) | < 0.001 |