Table 3.
NIRS variability by postnatal age and exposure to chorioamnionitis
| Day 1 | Day 2 | Day 3 | Day 7 | |||
|---|---|---|---|---|---|---|
| VarI | O2Hb | Chorio (+) | 3.72 (2.64–4.91) | 4.28 (3.15–5.52) | 3.57 (3.03–5.89) | 3.76 (3.17–5.12) |
| Chorio (−) | 4.41 (3.19–5.83) | 5.98 (4.39–7.90) | 5.08 (4.28–7.24) | 4.18 (3.71–7.4) | ||
| HHb | Chorio (+) | 2.55 (1.72–3.50) | 3.15 (2.89–4.48) | 2.25 (1.75–4.45) | 3.48 (1.95–4.98) | |
| Chorio (−) | 3.35 (2.49–4.46) | 3.98 (3.05–5.78) | 3.15 (2.5–5.84) | 2.84 (2.15–4.98) | ||
| tHb | Chorio (+) | 3.63 (2.84–5.98) | 4.44 (3.21–6.03) | 3.77 (2.57–4.70) | 4.54 (3.44–5.47) | |
| Chorio (−) | 3.83 ((2.97–5.73) | 4.54 (2.83–6.38) | 4.35 (3.49–5.49) | 4.14 (3.15–5.53) | ||
| VarS | O2Hb | Chorio (+) | 5.25 (2.83–9.01) | 5.06 (3.23–8.38) | 3.52 (2.87–5.67) | 4.91 (4.22–8.88) |
| Chorio (−) | 4.62 (3.04–7.06) | 5.30 (3.23–7.13) | 4.79 (3.73–5.75) | 4.96 (3.67–8.88) | ||
| HHb | Chorio (+) | 2.63 (1.80–5.32) | 2.59 (1.64–10.02) | 2.14 (1.55–2.78) | 3.00 (1.95–12.16) | |
| Chorio (−) | 2.57 (1.91–3.86) | 2.75 (2.37–3.75) | 2.39 (1.88–3.27) | 3.22 (2.33–3.99) | ||
| tHb | Chorio (+) | 6.19 (3.68–13.75) | 6.89 (3.83–12.51) | 4.49 (3.31–7.09) | 6.83 (5.32–10.73) | |
| Chorio (−) | 5.69 (3.79–9.67) | 6.80 (3.43–8.78) | 5.11 (4.26–7.02) | 5.77 (4.35–9.62) |
VarI and VarS, intermediate and short-term variability, respectively. O2Hb, HHb, tHb: oxygenated, deoxygenated, and total hemoglobin, respectively.
Values: median (Q1–Q3); units are mm/L.