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) |