What is the impact of birth weight corrected for gestational age on later onset asthma: a meta-analysis

Table 5 SGA vs. non-SGA: the subgroup analysis

Stratification		Number of studies	I²	Model	OR (95% CI)
Overall		12	87.80%	Random	1.07 (0.94–1.21)
Study design	Case–control	1	–	Random	0.87 (0.56–1.35)
	Cohort	5	76.60%	Random	1.05 (0.86–1.29)
	Cross-sectional	6	88.80%	Random	1.08 (0.91–1.29)
Study site	Europe	5	91.20%	Random	0.94 (0.69–1.28)
	North America	4	65.10%	Random	1.06 (0.88–1.27)
	Asia	3	0%	Random	1.16 (1.08–1.25)*
Sample size	< 5000	3	30.7%	Random	0.80 (0.54–1.18)
	5000–10,000	1	–	Random	0.32 (0.20–0.52)*
	10,000–50,000	3	43.20%	Random	1.10 (0.98–1.25)
	50,000–100,000	3	0%	Random	1.15 (1.07–1.24)*
	> 100,000	2	0%	Random	1.41 (1.33–1.50)*
Asthma definition	Questionnaire	5	87.50%	Random	0.72 (0.43–1.20)
Asthma definition	Medical record	7	88.70%	Random	1.19 (1.04–1.35)*

ISSN: 1710-1492