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To describe the distribution characteristics of the duration of respiratory events in patients with obstructive sleep apnea (OSA) and analyze the predictive factors of nocturnal minimum blood oxygen saturation.
A total of 265 OSA patients who underwent polysomnography (PSG) in the Sleep Medicine Center of the West China Fourth Hospital of Sichuan University from January to December 2022 were divided into mild, moderate, and severe groups according to their Apnea Hyponea Index (AHI) values. The differences of basic information and sleep parameters dominated by respiratory events were described. The correlation factors of nocturnal lowest oxygen saturation were selected, and the factors with r > 0.3 were included in the multiple linear regression model.
With the aggravation of OSA, the proportion of male, smoking and drinking increased, neck circumference, apnea index, longest apnea time, snoring index, and maximum systolic blood pressure increased (P < 0.05). The lowest oxygen saturation at night was correlated with sex, age, BMI, apnea index, longest apnea time, and average apnea time. Multiple linear regression results showed that the longest apnea time, apnea index, BMI, and the highest systolic blood pressure were negatively correlated with the lowest nocturnal oxygen saturation (P < 0.05). The longest apnea time was the strongest predictor of the lowest nocturnal oxygen saturation (standardized β=-0.516, P < 0.05, 95%CI: -0.579 to-0.453).
The longest apnea time plays an important role in evaluating the severity of OSA and predicting the lowest blood oxygen saturation at night.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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