Related by context. Frequent words. (Click for all words.) 69 Cigarette smoking 67 passive smoking 67 Secondhand smoke 61 Coronary heart 59 Premature birth 59 Sleep apnea 59 Bowel cancer 58 Cigarette smoke 58 Tooth decay 57 Obstructive sleep apnea 57 Vitamin D deficiency 57 Binge drinking 57 Lung cancer 57 Cardiovascular disease 56 death syndrome SIDS 56 Periodontal disease 55 Preterm birth 55 Meningococcal disease 55 Prolonged exposure 55 Diabetic retinopathy 54 secondhand smoke exposure 54 Cervical cancer 54 Birth defects 54 Coronary artery disease 53 alcoholic liver 53 secondhand tobacco 53 liver cirrhosis 53 disease COPD 53 Cirrhosis 53 Childhood obesity 53 Malnutrition 53 heart disease 53 cardiovascular disease CVD 53 Sleep deprivation 52 Sudden cardiac arrest 52 Lead poisoning 52 preventable deaths 52 Oxidative stress 52 asthma bronchitis 52 Carbon monoxide poisoning 52 Chronic diseases 52 cardiovascular diseases 52 unhealthy diets 52 secondhand smoke 51 Prematurity 51 Postpartum depression 51 vitamin D deficiency 51 Particulate matter 51 Obesity 51 dental decay 51 neural tube defect 51 Teenage pregnancy 51 Breast cancer 51 asthma 51 Tanning beds 51 Anaemia 51 Rotavirus 51 aggravate asthma 51 COPD 51 Colorectal cancer 50 Ovarian cancer 50 Atrial fibrillation 50 cigarettes smoked 50 Chickenpox 50 congenital malformations 50 Bladder cancer 50 Preeclampsia 50 gum disease 50 Saturated fat 50 cigarette smoking 50 cardiovascular disease 50 Emphysema 50 die prematurely 50 Flu pandemic 50 Chronic pain 50 venous thrombosis 50 Rheumatoid arthritis 50 clinically obese 49 asthma exacerbations 49 postmenopausal breast cancer 49 Smoking 49 Diarrhoea 49 low birthweight 49 Ocean acidification 49 congenital abnormalities 49 obesity 49 Eating disorders 49 Antibiotic resistance 49 smokers 49 Sexually transmitted diseases 49 Alzheimers disease 49 lung diseases 49 coronary heart 49 Smokeless tobacco 49 Erectile dysfunction 49 Chronic kidney 49 Bipolar disorder 48 modifiable risk 48 bmj.com 48 Quitting smoking 48 respiratory diseases