A study by the International Agency for Research on Cancer (IARC) provides new evidence that increased weight and obesity may result in increased smoking. The study, published in the British Medical Journal (BMJ) and funded by Cancer Research UK (CRUK), found that increased body mass index (BMI), body fat percentage, and waist circumference were associated both with a higher risk of being a smoker and with greater smoking intensity, measured by the number of cigarettes smoked per day. These results were consistent in both men and women.