Source: Hong Kong Standard (hk)
Date: 2010-06-30,

Smokers who quit by sheer willpower will most likely resume the
habit soon after, according to a concern group.

In a poll of 508 smokers by the Hong Kong Primary Care Foundation
Smoking Cessation Alliance, 55 percent of respondents had
attempted to quit three times on average.

Eighty percent went cold turkey, but 92 percent of them resumed
smoking within less than a year.