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Distribution of OSA by gender. Population parameters with a 95% confidence level. NO OSA: Pearson's Chi square = 4.310, p = 0.038. MILD OSA: Pearson's Chi square = 4.906, p = 0.027. MODERATE OSA: Pearson's Chi square =1.191, p = 0.167. SEVERE OSA: Pearson's Chi square = 13.682, p < 0.001.
