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Fig. 1.

Study flow chart
Study flow chart

Fig. 2.

Patterns of ROX index and HACOR from day 1 to day 6
Patterns of ROX index and HACOR from day 1 to day 6

Fig. 3.

Receiver operating curve analysis of ROX-index and HACOR score from day 1 to day 6
Receiver operating curve analysis of ROX-index and HACOR score from day 1 to day 6

Fig. 4.

Age, SOFA, ROX score interaction
Age, SOFA, ROX score interaction

Comparison of Demographic, Severity of illness, Inflammatory markers between NIV success vs Failure patients

Total NIV Success (n=179) NIV failure (n=262) p value
Age 60 (19–90) 54(53–58) 62(61–64) <0.001
M:F 311:130 126:53 185:77 0.960
DM 241(54.6%) 106(59.2%) 135(56%) 0.111
HTN 268(60.8%) 103(57.5%) 165(63%) 0.251
CAD 64 (14.5%) 22(12.3%) 42(16%) 0.274
CKD 24(5.4%) 7(3.9%) 17(6.5%) 0.241
COAD 22(5%) 8(4.5%) 14(5.3%) 0.629
Symptom-admission duration (days) 7 (0–14) 3(0–8) 4(1–14) 0.783
Baseline P/F ratio 125(56–280) 145(140–156) 117(110–121) <0.001

ARDS category <0.001
Mild 32 (7.3%) 18(56.3%) 14(43.8%)
Moderate 282 (63.4%) 136(48.2%) 146(51.8%)
Severe 127(28.8%) 25(19.7%) 80.3%
Remedesivir 286 (64.9%) 117(65.4%) 169(64.5%) 0.853
TCZ 23 (5.2%) 11(6.1%) 12(4.6%) 0.468
Vasopressors 172(39%) 2(1.1%) 170(64.9%) <0.001

Steroid <0.001
Early High 283 (64.2%) 126(70.4%) 157(59.9%)
Early low 113 (25.6%) 50(27.91%) 63(14.3%)
Indeterminate 45 (10.2%) 3 (1.7%) 42(9.5%)

BSI
NG 351(79.6%) 164(91.6%) 187(71.4%) <0.001
Gram neg 56(12.7%) 9(5%) 47(17.9%)
Positive 14 (3.2%) 3(1.7%) 11(4.2%)
Fungal 20(4.5%) 3(1.7%) 17(6.5%)
Shock 134 (30.4%) 1(0.6%) 133(50.8%) <0.001
AKI 109(24.7%0 8(4.5%) 101(38.5%) <0.001
SOFA 4(2–14) 3(3–4) 6(6–7) 0.0001
Baseline CRP 101(1.98–870) 75(68–98.70) 116.20(98–135) 0.006
Baseline ALC 760(120–3640) 860(760–920) 720(650–780) <0.001
ICU LOS 9(1–90) 7(7–8) 11(10–13) <0.001
Hospital LOS 14(1–95) 14(12–16) 14(13–15) 0.349

Ventilatory parameter comparison- HACOR/ROX

Total Success (n=175) Failure (n=262) Univariate analysis OR (CI)
HACOR D1 5(0–9) 4(4–5) 6(6–7) 1.963(1.696–2.273)
ROX D1 4.13(1.9–9.27) 5.14(4.9–5.3) 3.53(3.33–3.68) 0.309(0.245–0.389)
HACOR D2 5(0–10) 3(3–4) 6(6–7) 2.735(2.250–3.325)
ROX D2 4.1(1.7–12.15) 5.62(5.36–5.85) 3.32(3.16–3.50) 0.194(0.143–0.262)
HACOR D3 5(0–9) 3(3–4) 7(7–8) 3.064(2.435–3.857)
ROX D3 4.5(1.68–13.22) 6.06(5.85–6.27) 3.3(3.13–3.50) 0.186(0.131–0.263)
HACOR D4 5(0–10) 3(3–4) 7(7–8) 3.119(2.416–4.027)
ROX D4 2.7(2–14.1) 6.08(5.83–6.50) 3.29(3.10–3.57) 0.182(0.125–0.266)
HACOR D5 4.0(0–10) 2(2–3) 7(7–8) 3.745(2.647–5.300)
ROX D5 5.2(1.95–10.47) 6.3(6.15–6.6) 2.95(2.8–3.20) 0.182(0.119–0.279)
HACOR D6 4 (0–10) 2.0(2–3) 7.5(7–8) 3.536(2.442–5.119)
ROX D6 5.4(1.5–12.65) 6.84(6.35–7.14) 2.89(2.66–3.20) 0.159(0.093–0.272)
No of days with HACOR>5 2(0–18) 1(1–2) 3(3–4) 1.87(1.58–2.09)

Summary of studies depicting NIV failure

Reference, Year (Country) Setting Modes NIRS failure definition HACOR score in Failure ROX Score in Failure NIRS Failure Mortality Predictors of Failure
Duan et al. 2021 (China)19 ICU (non-COPD) NIV Need of IMV as rescue therapy 7 (at initiation) 5 (at 1–2 hours) 14.7 % 9.4 % HACOR score, Duration of NIV, Heart rate, pH, GCS, Mean Arterial BP, P/F ratio, PaCO2
Guia et al. 2021 (Italy, Portugal, USA)15 ICU (COVID) NIV (CPAP) Need of IMV as rescue therapy and Death 5 27.3 % 23 % HACOR score, Age, P/F ratio
Valencia et al. 2021 (Colombia)13 Emergency Department HFNC (COVID) Need of IMV as rescue therapy and Death 7.14 ±3.6 5.61 ±4.1 62.0 % 29.3 % HACOR score, GCS, ROX index, Heart Rate, Respiratory Rate, PaCO2, SaO2, pH, PaO2, P/F ratio, Chronic Kidney Disease, Co-Infections
Jog S et al. 2021 (India)20 ICU (COVID) NIV/HFNC Need of IMV as rescue therapy and Death 64.1 % 56.9 % Age, Medical Comorbidities, Admission SpO2, Non-Respiratory organ dysfunction
Prakash J et al. 2021 (Meta-analysis)16 ICU (COVID) HFNC 5 (24 hr) ROX score
Prakash J et al. 2021 (Meta-analysis)16 ICU (COVID) HFNC 5 (24 hr) ROX score
Khan MS et al., 2022 (India)21 ICU (COVID) HFNC Need of NIV or IMV as rescue therapy 3.4 ± 0.4 (1 hr) 4.4 ± 0.9 (6 hr) 28.9 % 27.1 % (28-day) Age, APACHE ll, SOFA, Lag time to HFNC, Duration of HFNC, ICU LOS, PF ratio, ROX index, D-dimer, IL-6, RBS, Admission SpO2
Santus et al. 2022 (Italy)14 HDU (COVID) CPAP (Helmet) Need of IMV as rescue therapy, Transfer to ICU and Death 5 (1 hr) 6.2 (4.7–7.7) (1hr) mROX 5.8 (3.8–8.9) (1 hr) 38.4 % 12.4 % Age, Ischaemic Heart Disease, COPD, CPAP duration, Hospital LOS, WBC count, D-dimer, CRP, PEEP, FiO2, PF ratio, Respiratory rate, A-a O2 gradient, GCS, ROX index, mROX index, HACOR score PaCO2,
Chacko et al. 2022 (India)18 ICU (COVID) NIV Need of IMV as rescue therapy or Death 36.4 % 30.1 % Age, Disease Severity, Admission PF ratio, Respiratory Rate, High CK-MB, Need for organ support, Duration of continuous NIV, ICU LOS and hospital LOS

Multivariable models for NIV failure. The models were created on 327 participants having complete information about all covariates. The model diagnostics indicate the substantial reduction in error variances after theory driven sequential sections of variables

Predictors Ref. Category. NIV_Success Odds Ratios CI p

OR CI p OR CI p OR Cl p OR CI p OR CI p
R0X>4.47 0.19 0.13–26 <0.001 0,18 0.12–0.25 <0.001 0,18 0.12–0.25 <0.001 0,17 0.11–0.25 <0.001 0,15 0.09–0.23 <0.001
Age>60Yrs 5, 2.47–11.83 <0.001 5, 238–11.74 <0.001 5, 230–1158 <0.001 4, 1.66–10.18 0,003
GenderF 0,64 0.29–1.41 0,271 59 0.26–1.33 0,208 0,65 0.28–1.47 0,300 37 0.13–1.00 57
Diabetes+ 0,61 0.29-1.27 0,184 59 0.28–1.25 0,170 59 0.27–1.26 0,176 55 023–1.30 0,175
Illness_ICU_IntervalT2(Int) 0,72 0.29–1.72 0,456 0,76 031–1.86 355 0,77 0.27–2.15 0,617
Illness_ICU_IntervalT3(High) 2, 0.87–5.25 0,100 222 0.90–5.62 0,086 3, 1.16–9.26 0,027
ALCDI_Tertile2(Int) 0,45 0.17–1.11 87 0,87 0.29–258 0,796
ALCDI_Tertile3(High) 0,43 0.16–1.07 0,071 0,75 0.26–2.16 585
SOFA Score 2, 1.60–2.71 <0.001

Observations 327 327 327 327 327
R2 Tjur 393 0,636 0,646 0,654 0,729
AIC 224, 209, 207, 206582 169,
log-Likelihood −110213 −99334 −96387 −94291 −74,
eISSN:
2393-1817
Język:
Angielski
Częstotliwość wydawania:
4 razy w roku
Dziedziny czasopisma:
Medicine, Clinical Medicine, Internal Medicine, other, Surgery, Anaesthesiology, Emergency Medicine and Intensive-Care Medicine