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.
The law makes any employee who works in California for 30 or more days on or after January 1, 2015 eligible for paid sick leave. An employer must keep records documenting the hours worked and paid sick days accrued and used by an employee for at least three years.