This reasonably high quality study found evidence that exposure to environmental tobacco smoke was associated with a small increase in risk of glucose intolerance [a pre-diagnostic indicator of diabetes] within a 15 year timescale.
Evidence from:
TK Houston et al. BMJ (2006) Vol. 332 p 1064 – 1069
“Active and passive smoking and development of glucose intolerance among young adults in a prospective cohort: CARDIA study”
For risk assessment purposes it would be helpful to know how many people have no other predispising vulnerability to developing diabetes.
Further detail: