Table 5 Poisson’s Univariate Regression Analysis for the association between the independent variables and the underweight condition

OMAS (continuous variable)

0.44 (0.31–0.62)

<0.001

NOT-S (continuous variable)

1.19 (1.03–1.36)

0.014

Birth (term)

preterm

2.80 (0.94–8.34)

0.063

Birth weight (normal)

 Low weight + very low weight

3.93 (1.30–11.87)

0.015

 Very low weight (low weight)

1.79 (1.05–3.05)

0.031

Anticonvulsant

3.87 (1.30–11.45)

0.014

Tranquilizer

4.23 (1.39–12.91)

0.011

Feeding (eating by him/herself) with help + sonda

4.03 (2.27–7.17)

<0.001

 Feeding help (normal)

3.64 (0.87–15.24)

0.077

 Probe (normal)

16.4 (4.40–61.07)

<0.001

Cognitive impairment (moderate) Severe

2.81 (1.47–5.38)

0.002

GMFCS (continuous variable)

1.68 (1.22–2.31)

0.001

Mother’s School degree (≤ 8 years)

>8 years

0.14 (0.01–1.10)

0.063

Father’s occupation (no)

yes

14.15 (8.64–23.17)

<0.001