Table 4 Mathematical equations to predict CPAP level for patients with OSA in literatures
Study group, year | Country | Number of patients, Development (D)/Validation (V) | Mathematical equation |
|---|---|---|---|
Ebben MR [8] | USA | Oronasal mask D = 66 V = 66 Nasal mask D = 100 V = 100 | Oronasal mask 0.03 × AHI-0.130 × minSpO2 + 19.732 Nasal mask 0.017 × AHI-0.092 × minSpO2 + 0.225 × NC + 5.534 |
SaiphoklangN [16] | Thailand | D = 180 V = 0 | 4.614 + 0.173 × NC + 0.067 × BMI + 0.030 × RDI-0.076 × minSpO2 |
Wu MF [23] | China | D = 57 V = 30 | 6.380 + 0.033 × AHI-0.068 × minSpO2 + 0.171 × BMI |
Lee GH [24] | Korea | D = 178 V = 178 | 6.656 + 0.156 × BMI-0.071 × minSpO2 + 0.041 × RDI + 0.094ESS |
Schiza SE [25] | Greece | D = 1111 V = 0 | Men 5.16 + 0.003 × smoking in pack years + 0.054 × BMI + 0.016 × AHI-0.403 Women 5.16 + 0.003 × smoking in pack years + 0.054 × BMI + 0.016 × AHI-0.806 |
Liu JH [26] | China | D = 134 V = 0 | − 0.7656 + 1.3148 × Sex + 0.2147 × Neck + 0.0175 × LAT + 0.0291 × AHI |
Xia SY [27] | China | D = 139 V = 0 | 2.878 + 0.035 × AHI + 0.035 × LAT + 0.034 × WC |
Loredo JS [29] | USA | D = 76 V = 0 | 30.8 + RDI × 0.03-minSpO2 × 0.05-meanSpO2 × 0.2 |