Development of a real-world database for asthma and COPD: The SingHealth-Duke-NUS-GSK COPD and Asthma Real-World Evidence (SDG-CARE) collaboration

Table 3 Comparison of data from SingHealth COPD and Asthma Data Mart (SCDM) SGH asthma cohort and asthma cohort from Tay et al. [30]

	Comparison Cohort (Tay et al. [30]) n = 420	SCDM SGH Asthma cohort (2015 to 2019) n = 5,563
Age, mean (SD) years	52 (18)	52.1 (21.6)
Gender = Male, %	47.1	51.0
Race, %
Chinese	56.2	58.9
Malay	24.8	14.9
Indian	13.3	16.7
Others	5.7	9.4
Ex or current smoker*, %	24.3	15.3
Pre-bronchodilator FEV1 percentage¹, mean (SD)	76 (23)	77.0 (3.0)

¹Excluding those with missing values in computation of proportions and mean. Most of the analysis matched the existing studies except for the higher proportion of current or ex-smokers (24.3% vs 15.3%) and the higher proportion of Malays in the test cohort from Tay et al. [30] (this could be because the test cohort used by Tay et al. [30] included an external set of patients)

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