Child criteria include All except :

child&;s criteria odf liver chirrosis 0.9 to 1.3 mg/dL for adult males. 0.6 to 1.1 mg/dL for adult females. 0.5 to 1.0 mg/dL for children ages 3 to 18 years. 0.3 to 0.7 mg/dL for children under age 3. Low values Pregnancy can also cause low blood creatinine levels. Low creatinine clearance levels can mean you have chronic kidney disease or serious kidney damage. Kidney damage can be from conditions such as a life-threatening infection, shock, cancer, low blood flow to the kidneys, or urinary tract blockage. Ref Davidson edition23rd pg 908