Writers and authors earned a median annual salary of $61,240 in 2016, according to the U.S. Bureau of Labor Statistics. On the low end, writers and authors earned a 25th percentile salary of $43,130, meaning 75 percent earned more than this amount. The 75th percentile salary is $83,500, meaning 25 percent earn more. In 2016, 131,200 people were employed in the U.S. as writers and authors.
Which numbers are especially important in predicting kidney healthâand what's in the normal range? Estimated GFR number â Measures kidney function, over 60 is normal, under 60, talk to your doctor. GFR, or glomerular filtration rate, tells you how well your kidneys are doing their job of filtering the blood.
The most commonly used formula is the 4-variable MDRD, which estimates GFR using four variables: serum creatinine, age, ethnicity, and gender. The original MDRD used six variables with the additional variables being the blood urea nitrogen and albumin levels.nother estimation tool to calculate GFR is the Mayo Quadratic formula. This formula was developed by Rule et al, in an attempt to better estimate GFR in patients with preserved kidney function. It is well recognized that the MDRD formula tends to underestimate GFR in patients with preserved kidney function.