BMC Oral Health

Table 3 DMFS outcome data at baseline and change in DMFS during the follow up period for each tobacco group, residential-area household purchasing power group and baseline DMFS group, with p-values for the tobacco group comparisons of change in DMFS

From: Tobacco use and caries risk among adolescents – a longitudinal study in Sweden

			DMFS baseline		ΔDMFS
SE group	Baseline DMFS group	Tobacco group	N	Mean	N	Mean	p-value*
< 10	0	Ever users	63	0.0	63	0.4	0.33
	0	Never users	774	0.0	774	0.4	0.33
	1-3	Ever users	49	1.6	49	1.2	0.44
	1-3	Never users	492	1.7	492	1.0	0.44
	> 3	Ever users	40	7.6	40	2.8	0.20
	> 3	Never users	287	6.5	287	1.8	0.20
10 – 19.9	0	Ever users	115	0.0	115	0.7	0.05
	0	Never users	875	0.0	875	0.6	0.05
	1-3	Ever users	129	1.9	129	1.6	0.001
	1-3	Never users	810	1.8	810	0.9	0.001
	> 3	Ever users	138	7.3	138	2.5	0.002
	> 3	Never users	610	6.8	610	1.7	0.002
20 – 29.9	0	Ever users	206	0.0	206	0.7	0.001
	0	Never users	1370	0.0	1370	0.5	0.001
	1-3	Ever users	241	1.9	241	1.8	0.001
	1-3	Never users	1285	1.8	1285	1.1	0.001
	> 3	Ever users	308	8.0	308	2.7	0.45
	> 3	Never users	1171	7.8	1171	2.5	0.45
30+	0	Ever users	45	0.0	45	0.8	0.10
	0	Never users	287	0.0	287	0.6	0.10
	1-3	Ever users	47	2.0	47	2.3	< 0.001
	1-3	Never users	293	1.9	293	1.2	< 0.001
	> 3	Ever users	70	8.9	70	3.3	0.57
		Never users	312	8.8	312	2.6

* P-value from the Wilcoxon-Mann–Whitney test comparing the distributions of DMFS between ever vs. never users.
The overall p-value < 0.0001 (stratified Wilcoxon-Mann–Whitney test; with additional stratification by sex).

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ISSN: 1472-6831

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