Table 3.

Bayesian multivariable models of factors related to high-risk cluster of lifestyle behaviors among in-school adolescents in Vietnam

	Model 1		Model 2		Model 3
	Males	Females	Males	Females	Males	Females
	OR (95% HDI)	OR (95% HDI)	OR (95% HDI)	OR (95% HDI)	OR (95% HDI)	OR (95% HDI)
Fixed part
Intercept	0·30 (0·25–0·35)	0·20 (0·17–0·24)	0·35 (0·26–0·47)	0·23 (0·17–0·30)	0·24 (0·14–0·43)	0·13 (0·08–0·23)
School quality proxy(Ref: 1st tertile)
2nd tertile			1·08 (0·73–1·62)	1·18 (0·77–1·78)	0·98 (0·70–1·38)	1·10 (0·77–1·59)
3rd tertile			0·58 (0·39–0·88)	0·64 (0·42–0·94)	0·67 (0·46–0·93)	0·69 (0·47–0·98)
Student-level covariates
Age(Ref: 13)
14					1·08 (0·75–1·57)	1·54 (1·08–2·22)
15					1·34 (0·93–1·95)	1·48 (0·99–2·22)
16					2·10 (1·41–3·06)	2·36 (1·58–3·55)
17					3·40 (2·32–5·00)	2·24 (1·51–3·40)
BMI-Z score					1·03 (0·96–1·10)	0·94 (0·86–1·03)
Place of residence(Ref: Rural)
Urban					1·18 (0·90–1·58)	1·30 (0·96–1·76)
Living with mother/father(Ref: No)
Yes					0·78 (0·63–0·98)	0·85 (0·68–1·05)
Parental monitoring					0·93 (0·90–0·97)	0·93 (0·89–0·97)
Number of close friends(Ref: 0)
1					1·15 (0·78–1·61)	1·02 (0·74–1·42)
2					1·00 (0·69–1·40)	1·22 (0·90–1·71)
≥3					1·15 (0·86–1·53)	1·17 (0·89–1·57)
Loneliness(Ref: No)
Yes					1·34 (1·04–1·70)	1·53 (1·21–1·92)
Worrying(Ref: No)
Yes					1·20 (0·84–1·72)	1·68 (1·27–2·21)
Truancy(Ref: No)
Yes					2·23 (1·82–2·74)	2·01 (1·50–2·49)
Random part
Variance estimate	0·46 (0·29–0·72)	0·50 (0·29–0·72)	0·40 (0·25–0·64)	0·43 (0·27–0·71)	0·23 (0·12–0·40)	0·28 (0·15–0·48)
VPC (%)§	12·4	13·3	11·0	11·8	6·6	7·9
% Explained†	–	–	12·5	12·2	42·9	36·0

HDI: Highest density interval; OR: Odds ratio

Model 1: A null 2-level random effects model, with students at level-1, and school at level-2; Model 2: Model 1 + main predictors (i.e., School quality proxy); Model 3: Model 2 + all student-level covariates

^§VPC calculated as: [σ²_μ0/(σ²_μ0 + 3.29)]*100

^†% Explained calculated as: [(σ²_{Model N} - σ²_{Model N + 1})/σ²_{Model N}]*100