Systematic review of the relation between smokeless tobacco and non-neoplastic oral diseases in Europe and the United States

Table 9 Snuff use and endpoints relevant to dental caries and tooth loss – evidence from Sweden

Study	Endpoint	Time of exposure	Statistic	Exposed^a	Unexposed^a	Summary of statistical tests^b
Rolandsson 2005 [20]	Teeth present	Not known	Mean	27.3	26.9	No significant difference
Bergström 2006 [11]	Teeth present	Current	Median	29	28	No significant difference
Bergström 2006 [11]	Teeth present	Former	Median	28	28	No significant difference
Rolandsson 2005 [20]	Filled teeth	Not known	% any	-	-	OR 1.91 (0.76–4.79)
Rolandsson 2005 [20]	Filled teeth	Not known	Mean	-	-	No significant difference
Hirsch 1991 [9]	Decayed, missing and filled teeth	Not known	Mean	-	-	Increased in users (p < 0.001)
Hirsch 1991 [9]	Decayed proximal surfaces	Not known	Mean	-	-	No significant difference
Hirsch 1991 [9]	Decayed and filled proximal surfaces	Not known	Mean	-	-	Increased in users (p < 0.001)
Hirsch 1991 [9]	Initially decayed proximal surfaces	Not known	Mean	-	-	Increased in users (p < 0.001)

^a In the Rolandsson 2005 [20] study, snuff use was compared with snuff non-use; in the Bergström 2006 [11] study, current or former use was compared with never use; in the Hirsch 1991 [9] study, snuff use was compared with no tobacco use
^b All statistical tests are unadjusted for any potential confounding variable. Where necessary ORs and 95% CIs are calculated from the data provided in the source paper

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