Fig. 2From: Periostin levels and eosinophilic inflammation in poorly-controlled asthmaScatter plots showing the association between sputum (a) and serum (b) periostin levels with sputum eosinophils. The data was analysed using STATA 11 software. Spearman’s rank correlation was used to assess the associations between sputum and serum periostin levels. Results were reported as significant when p < 0.05Back to article page