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Table 1 The main characteristics of the included studies

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

First author (year) Region Study design Sample size Participants Anthropometric measures of abdominal obesity Results
Papoutsakis (2015), [23] Greece Case–control 514 5–11 years old WC
WHtR
WC 1.99 (1.07, 3.68)
WHtR 2.24 (1.47, 3.40)
Musaad (2009), [32] US Case–control 584 5–18 years old WC
WHtR
CI
WC 1.20 (0.49, 2.92)
WHtR 2.00 (0.93, 4.31)
CI 2.63 (1.19, 5.82)
Leone (2012), [33] French Cohort 6267 ≥ 65 years old WC WC 3.84 (1.55, 9.49)
Egan (2015), [28] Norway Cohort 3139 12–30 years old WC WC 1.38 (1.07, 1.78)
WC (male) 1.80 (1.20, 2.71)
WC (female) 1.11 (0.80, 1.54)
Chen (2014), [34] China Cohort 2758 4th to 6th grade WC
WHR
WHtR
WC 1.22 (0.60, 2.50)
WHtR 1.17 (0.57, 2.39)
WHR 1.53 (0.64, 3.66)
Brumpton (2013), [35] Norway Cohort 23,191 19–55 years old WC WC 1.62 (1.36, 1.94)
Brumpton (2013), [35] Norway Cohort 23,245 19-65 years old WC WC (male) 0.88 (0.53, 1.47)
WC (female) 1.46 (1.04, 2.05)
Kronander (2004), [29] Sweden Cohort 4178 20–50 years old WC WC 2.60 (1.32, 5.12)
WC (male) 5.21 (1.52, 17.84)
WC (female) 1.80 (0.78, 4.12)
Turley (2006), [26] New Zealand Cross-sectional 10,026 25–44 years old WC WC (male) 1.60 (0.90, 2.30)
WC (female) 1.40 (1.00, 1.80)
Appleton (2006), [25] Australia Cross-sectional 4060 ≥ 18 years old WC
WHR
WC (male) 1.10 (0.70, 1.70)
WC (female) 1.50 (1.00, 2.10)
WHR (male) 1.30 (0.70, 2.50)
WHR (female) 1.50 (1.00, 2.20)
Egan (2014), [10] Norway Cross-sectional 15,625 12–19 years old WC WC 1.36 (1.16, 1.60)
WC (male) 1.38 (1.12, 1.70)
WC (female) 1.33 (1.04, 1.69)
Ma (2010), [11] US Cross-sectional 4493 ≥ 20 years old WC WC 1.75 (1.22, 2.51)
Chen (2005), [27] Canada Cross-sectional 2057 18–79 years old WC WC (male) 0.99 (0.51, 1.93)
WC (female) 1.87 (1.18, 2.98)