Prevalence and incidence of overweight and obesity among Vietnamese preschool children: a longitudinal cohort study

Table 4 Estimated prevalence of obesity by area, sex and age sub-cohort during the follow-up from 2013 to 2016

	Age sub-cohort	Number of children	Baseline % 95% CI	One year older % 95% CI	Three years older % 95% CI	Difference (2016–2013)
All samples		2602	6.4 5.4–7.3	4.4 3.6–5.2	4.5 3.7–5.3	−1.9^b**
Urban total		1311	9.2^a*** 7.7–10.8	7.5^a*** 6.1–8.9	7.1^a*** 5.7–8.5	−2.1^b*
Urban boys	3 years	169	8.9 4.5–13.2	8.3 4.1–12.5	7.7 3.6–11.8	−1.2
	4 years	242	7.0 3.8–10.3	7.9 4.4–11.3	10.3 6.5–14.2	3.3
	5 years	232	15.5 10.8–20.2	11.6 7.5–15.8	9.5 5.7–13.3	−6.0
	6 years	56	7.1 0.2–14.1	5.4 1.1–14.9	3.6 0.4–12.3	−3.5
Urban girls	3 years	140	4.3 0.9–7.7	6.4 2.3–10.5	8.6 3.9–12.3	4.3
	4 years	197	12.7 8.0–17.4	7.1 3.5–10.7	5.6 2.3–8.8	−7.1^b*
	5 years	228	7.5 4.0–10.9	4.8 2.0–7.6	3.5 1.1–5.9	−4.0
	6 years	47	2.1 0.1–11.3	2.1 0.1–11.3	0.0 0.0–7.5	−2.1
Rural total		1291	3.5 2.5–4.5	1.3 0.7–1.9	1.9 1.1–2.6	−1.6^b*
Rural boys	3 years	245	2.9 0.8–5.0	1.6 0.03–3.2	4.9 2.2–7.6	2.0
	4 years	219	2.7 0.6–4.9	0.5 0.0–2.5	0.5 0.0–2.5	−2.2
	5 years	204	3.9 1.2–6.6	1.5 0.3–4.3	1.0 0.1–3.5	−2.9
	6 years	24	0.0 0.0–14.2	0.0 0.0–14.2	0.0 0.0–14.2	0.0
Rural girls	3 years	191	3.1 0.6–5.6	2.1 0.05–4.1	3.7 1.0–6.3	0.6
	4 years	196	4.1 1.3–6.9	2.0 0.04–4.0	0.5 0.0–2.8	−3.6^b*
	5 years	193	4.7 1.7–7.7	0.5 0.0–2.9	0.5 0.0–2.9	−4.2^b**
	6 years	19	5.3 0.1–26.0	0.0 0.0–17.6	0.0 0.0–17.6	−5.3

ISSN: 1471-2431