Conditions here are listed according to lifetime risk, which is the likelihood of having a condition during your entire lifetime. The availability of accurate data regarding lifetime risks is much lower, compared to prevalence or incidence rates, so much of the information below is likely to be dubious. In most cases, the rates refer to the USA or other industrialized nations.

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Condition	Percent	Rate	US People	Data
Death	100.00%	1 in 1	272 million	100% eventually, just like taxes.
Acne	85.00%	1 in 1	231.2 million	about 85% of people (mostly in the teen years)
Toxoplasmosis	80.00%	1 in 1	217.6 million	Up to 80% of urban people show exposure to toxoplasmosis; most have become naturally immune.
Chlamydia pneumoniae	50.00%	1 in 2	136 million	50% of population has evidence of reaction by age 20 (DBMD)
Smoking	50.00%	1 in 2	136 million	1 in 2 chance of dying from a smoking-related disease (NIA)
Vaginal candidiasis	37.50%	1 in 3	102 million	75% women lifetime
Cancer	33.33%	1 in 3	90.7 million	about 1 in 3 lifetime risk; 38% of women and 43% of men (Canadian Cancer Statistics, National Cancer Institute of Canada, 2004)
Hepatitis A	32.00%	1 in 3	87 million	32 to 38% of population in the USA have history of the HepA disease 1991 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, NIDDK, 1994)
Irritable bowel syndrome	30.00%	1 in 3	81.6 million	about 30% of people
Pituitary Cancer	25.00%	1 in 4	68 million	25% of people have small pituitary tumors on autopsy but most are symptom-free.
Shingles	20.00%	1 in 5	54.4 million	2 in 10 lifetime (NIAID) 帶狀疱疹
Peptic Ulcer	10.00%	1 in 10	27.2 million	1 in 10 Americans over lifetime
Urinary tract infections	10.00%	1 in 10	27.2 million	1-in-5 women lifetime.
Kidney stones	10.00%	1 in 10	27.2 million	estimated 10% lifetime risk of kidney stones
Hives	10.00%	1 in 10	27.2 million	10-20% lifetime risk (NIAID)
Amphetamines	8.90%	1 in 11	24.2 million	8.9% of people reported prior use of amphetamines in Australia 2001 (2001 National Drug Safety Household Survey, AIHW, May 2002)
Acute Appendicitis	8.60%	1 in 11	23.4 million	8.6% risk for males, 6.7% for females (Rothrock et al, 2000).
Depression	7.90%	1 in 12	21.5 million	7.9-8.6% of adults will have major depression during their lifetime in Canada (Health Canada)
Thyroid disorders	6.25%	1 in 16	17 million	1 in 8 women during their lifetime in the US (American Medical Women’s Association); 1 in 8 for women (NWHIC)
Breast Cancer	6.25%	1 in 16	17 million	1 in 8 women lifetime risk in USA (NWHIC); 1 in 11 women will develop breast cancer during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Ecstasy	6.10%	1 in 16	16.6 million	6.1% of people have tried ecstasy in Australia 2001 (2001 National Drug Strategy Household Survey, AIHW)
Lung cancer	5.88%	1 in 17	16 million	1 in 17 lifetime risk of lung cancer for women in the US (Cancer Facts and Figures, American Cancer Society, 2004)
Prostate Cancer	4.55%	1 in 22	12.4 million	1 in 11 men will develop prostate cancer during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Hepatitis B	4.00%	1 in 25	10.9 million	4% of population in the USA have history of HepB disease 1990 (Digestive diseases in the United States: Epidemiology and Impact – NIH Publication No. 94-1447, NIDDK, 1994)
Dysthymia	3.00%	1 in 33	8.2 million	3-6% of adults will get dysthymia during their lifetime in Canada (Health Canada)Dysthymia:                                                                                                  Dysthymia is a milder but also more chronic form of depressive disorder than the better known major depression. The dysthymia sufferer usually has a persistent depressed mood with related symptoms such as a loss of interest in life and feelings of fatigue. Dysthymia can be diagnosed if depressive symptoms last more than 2 years and is accompanied by at least 2 other symptoms of depression.
Colorectal cancer	1.92%	1 in 52	5.2 million	1 in 26 women and 1 in 17 men will develop colorectal cancer during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Melanoma	1.43%	1 in 69	3.9 million	1 in 35 women and 1 in 25 men will develop melanoma during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Ovarian Cancer	1.40%	1 in 71	3.8 million	1.4% lifetime risk; 1 in 108 women will develop ovarian cancer during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Emphysema	1.40%	1 in 71	3.8 million	1.4% of noninstitutionalised people (3.1 million people) have ever been diagnosed with emphysema in the US 2002 (Summary Health Statistics for US Adults, 2002, NCHS, CDC)
Panic disorder	1.10%	1 in 90	3 million	3 million Americans (NIMH); 1.6% adults (USSG)
Cervical Cancer	0.85%	1 in 116	2.3 million	1 in 117 lifetime risk for women in the US (Cancer Facts and Figures, American Cancer Society, 2004)
Cancer of Unknown Primary Site	0.67%	1 in 149	1.8 million	1 in 75 women and 1 in 83 men will develop unknown primary cancer during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Uterine Cancer	0.67%	1 in 149	1.8 million	1 in 75 women will develop uterine cancer during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Mania	0.60%	1 in 166	1.6 million	0.6-1% of adults will have a manic episode during their lifetime in Canada (Health Canada)
Non-Hodgkin's Lymphoma	0.57%	1 in 176	1.5 million	1 in 88 women will develop non-Hodgkin’s lymphoma during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Stomach cancer	0.51%	1 in 200	1.4 million	1 in 99 men will develop stomach cancer during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Kidney Cancer	0.35%	1 in 285	951,048	1 in 143 women and 1 in 76 men will develop kidney cancer during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Pancreatic cancer	0.26%	1 in 389	697,435	1 in 195 women and 1 in 36 men will develop pancreatic cancer during their lifetime in Australia 2000 (AIHW and AACR, AIHW National Mortality Database, Australia’s Health 2004, AIHW)
Hysterectomy	0.00%	1 in 272 million	1	1/3 of women by age of 60 in the US (The National Women’s Health Information Center, CDC)