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. 2014 Jan 28;9(1):e87280. doi: 10.1371/journal.pone.0087280

Table 1. Exponents c for the conversion formula D2 = D1 (T2/T1)c for 3 different SpO2 thresholds, seven different minimal desaturation durations and for two different infant groups.

SpO2 Minimal desaturation Exponent c (95% CI)
Threshold (%) duration (sec) Group 1 Group 2
90 1 −0.918 (−0.945; −0.891) −0.834 (−0.854; −0.814)
5 −0.459 (−0.502; −0.416) −0.409 (−0.451; −0.367)
10 −0.110 (−0.120; −0.101) −0.104 (−0.118; −0.089)
15 −0.016 (−0.027; −0.004) −0.024 (−0.034; −0.014)
20 0.067 (0.058; 0.077) 0.033 (0.028; 0.038)
25 0.121 (0.109; 0.133) 0.083 (0.075; 0.092)
30 0.150 (0.136; 0.165) 0.108 (0.099; 0.116)
85 1 −1.000 (−1.045; −0.954) −0.904 (−0.933; −0.875)
5 −0.485 (−0.547; −0.423) −0.399 (−0.445; −0.352)
10 −0.057 (−0.075; −0.038) −0.046 (−0.057; −0.034)
15 0.079 (0.060; 0.099) 0.034 (0.018; 0.050)
20 0.193 (0.178; 0.209) 0.141 (0.123; 0.158)
25 0.326 (0.292; 0.360) 0.195 (0.190; 0.201)
30 0.375 (0.334; 0.415) 0.235 (0.217; 0.253)
80 1 −1.119 (−1.178; −1.060) −1.037 (−1.082; −0.993)
5 −0.482 (−0.547; −0.417) −0.462 (−0.520; −0.404)
10 −0.074 (−0.103; −0.045) −0.109 (−0.132; −0.086)
15 0.060 (0.031; 0.089) 0.020 (0.000; 0.041)
20 0.121 (0.067; 0.175) 0.193 (0.169; 0.218)
25 0.228 (0.181; 0.275) 0.188 (0.144; 0.233)
30 0.318 (0.257; 0.379) 0.347 (0.321; 0.374)