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Table 4 Multinomial logistical regression of sibship size or structure for thinness among boys

From: Association of number of siblings, birth order, and thinness in 3- to 12-year-old children: a population-based cross-sectional study in Shanghai, China

 

Total N

Grade 1 thinness

Grade 2 thinness

Grade 3 thinness

Model Ia

Model IIb

Model IIIc

Model Ia

Model IIb

Model IIIc

Model Ia

Model IIb

Model IIIc

Number of siblings

 None (only child)

26,351

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

 One

3457

1.13 (1.03, 1.24)*

1.11 (1.00, 1.24)

1.10 (0.98, 1.24)

1.27 (1.02, 1.60)*

1.34 (1.07, 1.69)*

1.28 (1.00, 1.63)

1.48 (1.08, 2.03)*

1.38 (0.96, 1.99)

1.31 (0.89, 1.92)

 Two or more

6027

1.00 (0.88, 1.12)

0.96 (0.83, 1.12)

0.96 (0.80, 1.16)

1.41 (1.19, 1.67)*

1.46 (1.17, 1.82)*

1.29 (1.02, 1.64)*

2.16 (1.61, 2.90)*

1.88 (1.30, 2.72)*

1.60 (1.07, 2.40)*

Birth order

 Only child

26,351

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

 Oldest child

3331

0.95 (0.81, 1.12)

0.91 (0.75, 1.10)

0.89 (0.73, 1.08)

1.33 (1.07, 1.64)*

1.28 (1.02, 1.61)*

1.32 (1.03, 1.70)*

1.57 (1.20, 2.04)*

1.34 (0.99, 1.82)

1.26 (0.90, 1.77)

 Middle child

3923

1.09 (0.92, 1.30)

1.08 (0.86, 1.35)

1.11 (0.86, 1.44)

1.36 (1.10, 1.68)*

1.45 (1.08, 1.93)*

1.20 (0.93, 1.56)

2.14 (1.57, 2.94)*

1.97 (1.29, 3.02)*

1.61 (0.98, 2.64)

 Youngest child

1869

1.13 (0.96, 1.32)

1.16 (0.94, 1.44)

1.17 (0.95, 1.45)

1.54 (1.14, 2.08)*

1.73 (1.30, 2.28)*

1.44 (1.09, 1.90)*

1.82 (1.28, 2.59)*

1.74 (1.20, 2.52)*

1.53 (1.01, 2.33)*

Number of younger siblings

 None (only child)

26,351

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

 One (oldest child)

1614

1.09 (0.86, 1.37)

1.04 (0.79, 1.38)

1.03 (0.77, 1.39)

0.94 (0.69, 1.28)

0.91 (0.64, 1.28)

1.03 (0.73, 1.45)

1.13 (0.71, 1.81)

1.04 (0.64, 1.68)

1.03 (0.63, 1.68)

 Two or more (oldest child)

1717

0.81 (0.61, 1.08)

0.78 (0.60, 1.02)

0.74 (0.55, 0.99)

1.70 (1.30, 2.23)*

1.64 (1.20, 2.23)*

1.59 (1.12, 2.28)*

2.00 (1.47, 2.72)*

1.60 (1.06, 2.41)*

1.44 (0.90, 2.29)

Number of older siblings

 None (only child)

26,351

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

1.00 (Ref)

 One (youngest child)

1738

1.17 (0.96,1.42)

1.20 (0.93, 1.56)

1.19 (0.92, 1.55)

1.60 (1.18, 2.16)*

1.82 (1.35, 2.46)*

1.57 (1.18, 2.09)*

1.77 (1.23, 2.56)*

1.70 (1.10, 2.62)*

1.52 (0.91, 2.53)

 Two or more (youngest child)

131

0.61 (0.14, 2.61)

0.66 (0.13, 3.24)

0.74 (0.14, 3.86)

0.81 (0.29, 2.26)

0.89 (0.20, 3.98)

0.93 (0.22, 4.01)

2.53 (0.82, 7.77)

2.91 (0.73, 11.63)

2.47 (0.66, 9.26)

  1. Ref: reference category
  2. a Model I: adjusted for age
  3. b Model II: adjusted for age and childhood characteristics (birthweight, feeding patterns, parental age at child birth, workday TV time, internet use time, snacking frequency)
  4. c Model III: adjusted for age, childhood characteristics and family characteristics (parental weight status, parental educational level, family income and residential site)
  5. *p < 0.05
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BMC Pediatrics

ISSN: 1471-2431

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