Fig. 2From: Role of serum periostin in severe obstructive sleep apnea with albuminuria: an observational studyAssociations between BMI and serum periostin at baseline. Black circles represent patients with severe OSA (AHI ≥30), and white circles represent patients with mild to moderate OSA (AHI ≥5 to < 30). BMI, body mass index; OSA, obstructive sleep apnea; AHI, apnea–hypopnea indexBack to article page