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Pulmonary Function Tests in Sickle Cell Disease. OBJECTIVE: To determine pulmonary function abnormalities in children with Sickle Cell Disease (SCD) from Western India. METHODS: In this cross sectional study conducted at Surat, Gujarat, India; equal number of age and gender matched children i.e., 99 in the age group of 6-18 y was recruited in case (children with SCD) and control (non-SCD healthy children) groups respectively. Weight, height, body mass index (BMI) and hemoglobin (Hb) were assessed as baseline characteristics and spirometry was performed to assess the pulmonary function. RESULTS: The two groups of children were comparable in the baseline characteristics such as weight, height and BMI, however mean hemoglobin was significantly low in SCD as compared to healthy controls [9.1 ± 1.52 vs. 11.4 ± 1.04 (p=0.001)]. Mean (% predicted) Forced expiratory volume in 1 s (FEV1) (86.79 ± 11.6 vs. 94.3 ± 16.1) and FVC (84.4 ± 11.5 vs. 91.75 ± 15.2) values were significantly low (p < 0.001) in cases. CONCLUSIONS: The present study revealed that the difference of pulmonary function tests between sickle cell patients and normal age matched controls were statistically significant but this difference was not clinically significant.