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Table 2 Quality assessment of the 5 cross-sectional studies according to AHRQ recommended criteria

From: Association between abdominal obesity and asthma: a meta-analysis

Studies 1 2 3 4 5 6 7 8 9 10 11
Turley et al. [26] × ×
Appleton et al. [25] ? × ? ×
Egan et al. [28] × × ? ?
Ma et al. [11] × ?
Chen et al. [27] × × ? ?
  1. 1–11 represents the 11 items of the AHRQ recommended criteria
  2. “√” means “yes”, “×” means “no”, “?” means “unclear”, “–” means “not suitable”