Early age at smoking initiation is associated with elevated cardiovascular disease and mortality risk in a nationwide population-based cohort.

Since smoking status was determined based on a one-time questionnaire, there may be significant recall bias and underreporting as well as changes in smoking intensity over time that are not reflected in our estimation of total PY.

also in 13,097 other papers

While a recent cohort study demonstrated a significant trend of increasing stroke risk with younger age at smoking initiation over a ten-year follow-up 25 , no such association with stroke was identified in a birth cohort followed up for five decades 26 .

also in 9,775 other papers