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Table 3 Multilevel logistic regression analyses across obesity definitions among children participating in the Irish COSI study

From: School sociodemographic characteristics and obesity in schoolchildren: does the obesity definition matter?

 

All children (n = 7542)

Boys (n = 3476)

Girls (n = 4066)

Younger boys (n = 1701)

Older boys (n = 1775)

Younger girls (n = 2080)

Older girls (n = 1986)

ORa

95% CI

p-value*

ORa

95% CI

p-value*

ORa

95% CI

p-value*

ORa

95% CI

p-value*

ORa

95% CI

p-value*

WHO 2007

 Sex (ref. boy)

1.04

0.93–1.15

0.515

–

–

–

–

–

–

–

–

–

–

–

–

 Age (ref. young children)

0.83

0.79–0.91

< 0.001

–

–

–

–

–

–

–

–

–

–

–

–

 School SES (ref. non-disadvantaged schools)

1.50

1.25–1.79

< 0.001

1.13

0.82–1.57

0.449

1.58

1.14–2.17

0.005

1.68

1.21–2.34

0.002

1.72

1.26–2.33

0.001

 School urbanisation(ref. urban)

1.04

0.89–1.22

0.627

1.16

0.88–1.53

0.297

1.08

0.82–1.41

0.595

1.07

0.79–1.44

0.674

0.90

0.68–1.20

0.482

 Measurement round

0.83

0.77–0.89

< 0.001

0.78

0.68–0.88

< 0.001

0.75

0.60–0.92

0.006

0.85

0.75–0.95

0.004

0.98

0.80–1.19

0.811

CDC 2000

 Sex (ref. boy)

1.14

1.01–1.28

0.032

–

–

–

–

–

–

–

–

–

–

–

–

 Age (ref. young children)

0.85

0.75–0.95

0.005

–

–

–

–

–

–

–

–

–

–

–

–

 School SES (ref. non-disadvantaged schools)

1.59

1.29–1.95

< 0.001

1.20

0.85–1.71

0.306

1.79

1.25–2.55

0.001

1.89

1.30–2.74

0.001

1.77

1.23–2.53

0.002

 School urbanisation(ref. urban)

1.02

0.85–1.23

0.828

1.03

0.75–1.40

0.867

0.94

0.69–1.30

0.717

1.19

0.85–1.67

0.313

0.96

0.69–1.33

0.788

 Measurement round

0.82

0.75–0.88

< 0.001

0.76

0.66–0.88

< 0.001

0.76

0.60–0.96

0.020

0.81

0.72–0.92

0.001

0.98

0.78–1.22

0.832

IOTF

 Sex (ref. boy)

1.37

1.21–1.54

< 0.001

–

–

–

–

–

–

–

–

–

–

–

–

 Age (ref. young children)

0.89

0.79–1.00

0.054

–

–

–

–

–

–

–

–

–

–

–

–

 School SES (ref. non-disadvantaged schools)

1.60

1.30–1.96

< 0.001

1.15

0.80–1.65

0.457

1.73

1.22–2.47

0.002

1.91

1.31–2.77

0.001

1.83

1.29–2.60

0.001

 School urbanisation(ref. urban)

1.08

0.90–1.30

0.412

1.22

0.89–1.66

0.217

1.02

0.74–1.40

0.913

1.21

0.86–1.69

0.277

0.96

0.69–1.33

0.789

 Measurement round

0.84

0.77–0.92

< 0.001

0.77

0.67–0.89

0.001

0.80

0.63–1.02

0.075

0.85

0.75–0.97

0.012

0.98

0.79–1.22

0.853

UK 1990

 Sex (ref. boy)

1.60

1.42–1.79

< 0.001

–

–

–

–

–

–

–

–

–

–

–

–

 Age (ref. young children)

0.30

0.26–0.35

< 0.001

–

–

–

–

–

–

–

–

–

–

–

–

 Height (cm)

1.11

1.10–1.12

< 0.001

1.15

1.12–1.17

< 0.001

1.09

1.08–1.11

< 0.001

1.14

1.12–1.16

< 0.001

1.09

1.08–1.11

< 0.001

 School SES (ref. non-disadvantaged schools)

1.40

1.10–1.77

0.006

1.35

0.95–1.92

0.095

1.56

1.09–2.24

0.016

1.61

1.04–2.50

0.032

1.44

0.96–2.14

0.075

 School urbanisation(ref. urban)

1.12

0.91–1.38

0.276

1.39

1.03–1.88

0.030

1.06

0.78–1.43

0.715

1.04

0.71–1.52

0.848

1.16

0.82–1.62

0.397

 Measurement round

0.58

0.54–0.63

< 0.001

0.52

0.45–0.61

< 0.001

0.58

0.45–0.74

< 0.001

0.56

0.49–0.64

< 0.001

0.61

0.49–0.77

< 0.001

WHeR

 Sex (ref. boy)

1.17

1.02–1.36

0.031

–

–

–

–

–

–

–

–

–

–

–

–

 Age (ref. young children)

0.92

0.80–1.06

0.237

–

–

–

–

–

–

–

–

–

–

–

–

 School SES (ref. non-disadvantaged schools)

1.46

1.12–1.89

0.005

1.40

0.93–2.10

0.108

1.78

1.14–2.79

0.011

1.52

0.98–2.34

0.059

1.46

0.94–2.27

0.093

 School urbanisation(ref. urban)

1.23

0.98–1.54

0.078

1.27

0.87–0.98

0.191

1.05

0.71–1.55

0.817

1.22

0.83–1.80

0.306

1.43

0.98–2.09

0.068

 Measurement round

0.79

0.98–1.54

< 0.001

0.82

0.69–0.98

0.025

0.77

0.58–1.01

0.063

0.75

0.65–0.87

< 0.001

0.79

0.61–1.04

0.092

  1. aAdjusted for random effects at school level
  2. *p-values in bold font are significant after correcting for multiple testing with the Benjamini- Hochberg False Discovery Rate [34]
  3. Younger children < 10.5 years; older children ≥10.5 years
  4. CDC Centers for Disease Control and Prevention, CI confidence interval, IOTF International Obesity Task Force, OR odds ratio, SES socioeconomic status, UK United Kingdom, WHeR waist-to-height ratio, WHO World Health Organisation
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