Health

Health & Wellness 6 min How the ideal body weight formulas compare from short heights to tall Four published ideal body weight formulas turn height and sex into one weight, and they were written as drug-d... AM Amelia Wong 18 Oct Health & Wellness 6 min CURB-65 death rates checked against the paper that defined the score CURB-65 grades community-acquired pneumonia in adults with one point each for confusion, raised urea, fast bre... PR Priya Nair 18 Oct Health & Wellness 6 min Field-test formulas for VO2 max put the same run at very different values Field tests estimate VO2 max, the most oxygen the body can use per minute for each kilogram of body weight, fr... AM Amelia Wong 16 Oct Health & Wellness 6 min Naegele's rule and the 280-day count give different pregnancy due dates more often than not A due date is counted from the first day of the last period, either by adding 280 days or by adding nine month... PR Priya Nair 16 Oct Statistics 5 min Riegel's race-time formula comes within about 2% of world records and predicts recreational marathons too fast Riegel's formula scales a known race time to another distance using an exponent, usually 1.06. Tested against... NA Nadia Rahim 15 Oct Health & Wellness 6 min Glasgow Coma Scale totals hide the eye, verbal and motor scores behind them A Glasgow Coma Scale total adds three separate observations of the eyes, speech and movement, and the same tot... PR Priya Nair 15 Oct Health & Wellness 6 min Equations estimating a one-repetition maximum match on heavy sets and diverge as reps climb A one-rep max is the heaviest weight a person can lift once, and published equations estimate it from a lighte... AM Amelia Wong 15 Oct Science 6 min Jet lag by direction, worked through on routes out of Singapore and Hong Kong Flying east asks the body clock to run earlier and flying west asks it to run later, and early estimates from... KE Kenji Tanaka 15 Oct Health & Wellness 6 min The usual mid-parental height range missed 12% of Galton's grown children The usual target height averages the parents' heights, shifts the result 6.5 cm for sex and allows 8.5 cm eith... PR Priya Nair 15 Oct Science 6 min Shortcut WBGT formulas land on both sides of Singapore's measured heat stress Singapore's official heat stress readings blend three thermometers, one of them in the sun. Checked against 30... KE Kenji Tanaka 15 Oct Health & Wellness 6 min Calculated LDL reads lower on Friedewald's formula than on Martin-Hopkins at high triglycerides A calculated LDL is total cholesterol minus HDL minus an estimate of the cholesterol in VLDL, and the Friedewa... PR Priya Nair 14 Oct Health & Wellness 6 min Dropping the sex point from the AF stroke score moved no combination between bands In 2024 the European Society of Cardiology replaced the CHA2DS2-VASc stroke score for atrial fibrillation with... PR Priya Nair 12 Oct Health & Wellness 4 min The Supplement Nicotinamide Riboside Did Not Slow Early Parkinson's in a Year-Long Trial In a 410-patient Norwegian trial, the NAD-raising compound brought no benefit, and patients did slightly worse... AM Amelia Wong 12 Oct Science 6 min Rare blood-group variants allow most of the child blood types a chart forbids The textbook ABO rule forbids at least one child blood type for every pairing of parent types except A with B.... NA Nadia Rahim 8 Oct Health & Wellness 6 min A bathroom scale's rounding can shift a sweat-rate test by a tenth of a litre an hour Sweat rate is body weight before exercise minus weight after, plus fluid drunk, minus urine, divided by the ho... AM Amelia Wong 8 Oct Health & Wellness 6 min QT correction formulas agree at 60 beats a minute and drift apart either side Bazett, Fridericia and Framingham correct the QT interval to a heart rate of 60 beats a minute, where all thre... PR Priya Nair 8 Oct Personality 6 min Blood type explains almost none of the variation in large Japanese and US surveys The belief that ABO blood type shapes temperament and compatibility has been popular in Japan since a 1971 boo... AM Amelia Wong 7 Oct Health & Wellness 6 min A baby's growth percentile depends on the chart behind it A growth percentile ranks one measurement against a reference group of children, and the WHO 2006 standard, th... PR Priya Nair 7 Oct Health & Wellness 6 min Colour-blindness simulators give their least consistent answers on blue and yellow A colour-blindness simulator runs each pixel through a published model of colour-vision deficiency. We compare... AM Amelia Wong 3 Oct Health & Wellness 4 min How many weeks you have left, by Singapore and Malaysian life tables A Singapore resident aged 65 can expect about 1,127 more weeks on the 2025 life tables, 141 more than the figu... PR Priya Nair 30 Sep Health & Wellness 5 min How accurate is the Chinese gender chart, and why versions disagree A test on 2.8 million Swedish births found the Chinese gender chart no better than a coin toss, and simply gue... PR Priya Nair 29 Sep Health & Wellness 9 min The same blood pressure reading is hypertension in America and not in Singapore 135 over 85 is stage 1 hypertension under the American guideline, high-normal in Singapore, and hypertension a... AM Amelia Wong 20 Sep Health & Wellness 7 min ASEAN requires an SPF number and no UVA rating at all The regional labelling guideline devotes a single sentence to ultraviolet A, so a shelf in Singapore or Kuala... AM Amelia Wong 19 Sep Health & Wellness 5 min A low-sugar drink can still get a Nutri-Grade D Singapore's Nutri-Grade letter grades drinks on sugar and saturated fat, and the worse of the two sets the gra... AM Amelia Wong 17 Sep