Female Smokers have 3x Likelihood of Urinary Bladder Symptoms
A recent survey of 2000 women, their lifestyles, and their bladder control between ages of 18 and 79 found that those that smoked had three times the likelihood of needing to urinary (measured with fewer than 2 hours between trips to the bathroom) and to report "urgency" (the need to un to the bathroom as soon as possible).
While no direct link was found, and it doesn't prove that smoking causes it, nicotine can have nasty effects on the bladder:
"There are reasons that smoking could directly affect those symptoms, according to Tikkinen. Based on animal research, nicotine may trigger excessive bladder muscle contractions. And over time, smoking may damage nerve function in the bladder."
So while it's quite possible nicotine can increase these bladder symptoms, there is no proof that smoking alone can cause incontinence.
Clinical trials have yet to be done to test the validity of bladder control and not smoking - but for the smokers out there, it's another reason to consider kicking the habit.
From the article on MSNBC: "Well-known risks, such as lung cancer and heart disease, can seem like distant threats to young people, he pointed out. "But bladder symptoms, you can get when you're young."
...and while we're at it, here are 5 reasons to quit.