Creatinine levels relate to both muscle mass and to kidney function. As you age, your muscle mass decreases but your kidneys tend to function less effectively. The net result is not much change in creatinine levels in the blood as you get older.
As a result, California employers are required by law to have workers' compensation insurance, even if they have only one employee. And, if your employees get hurt or sick because of work, you are required to pay for workers' compensation benefits.
Gov. Jerry Brown (D-Calif.) signed a bill making California the only state other than Connecticut to have a sick-leave mandate on its books. Under the law, employers will have to let workers accrue one hour of sick time for every 30 hours they work, to be capped at three days per year at employers' discretion.