Table 2

Reference ranges for oximetry parameters across the age spectrum

AuthorGestation (weeks) (n)Oximetry timing (postconceptual age, weeks)Mean saturations (%)Min
saturation (%)
ODI3ODI4% time <90%
Williams et al 22
Preterm at day 2/3
35 (34–36)
(n=43)
35 (34–36)97.8 (97.1–98.3)
Williams et al 22
Preterm at term equivalent
35 (34–36)
(n=43)
4098.8 (98.4–99.4)32.8 (25.9–41.4)
Williams et al 22
Term at day 2/3
40 (39–42)
(n=42)
40 (39–42)97.9 (96.7–98.9)29.3 (23.5–36.6)
Evans et al 10
Term at 1 month
39 (37–42)
(n=45)
44 (43–44)97.1 (13.7–18.6)80.4 (78.8–82.0)25.4 (22.0–28.8)16.2 (13.7–18.6)0.39 (0.26–0.55)
Evans et al 10
Term at 3 months
39 (37–42)
(n=38)
56 (54–57)97.7 (97.2–98.1)84.7 (83.3–86.1)13.9 (11.4–16.5)8.12 (6.46–9.77)0.11 (0.06–0.20)
Vézina et al 23
Term at 1 year
(n=562)1.1 year97.1 (95.5–98.0)
Median
(10th–90th centile)
6.7 (1.4–15.8)
(10th–90th centile)
0.1 (0.0–0.6)
%time <92% (10th–90th centile)
Ong et al 24 (n=66)6 months–12 years (median 7 years 10 months)97.57 (97.38–97.76)91.09 (90.3–91.9)2.58 (95th centile 6.43)1.14 (0.93–1.34)0.00 (0.05)
  • ODI3, Oxygen Desaturation Index at 3%; ODI4, Oxygen Desaturation Index at 4%.