Final answer:
The value outside of the expected reference range for a urine specimen is glucose at 90 mg/dL, which may indicate a condition such as diabetes mellitus.
Step-by-step explanation:
A medical assistant is evaluating laboratory results for a patient's urine specimen, specifically focusing on the presence of certain substances and their concentration levels. Based on the provided information and typical reference ranges for an adult, the value outside of the expected reference range is glucose: 90 mg/dL. Normally, urine should not contain glucose unless the blood glucose concentration gets very high, as seen in conditions like diabetes mellitus. Glucose appearing in the urine suggests that the renal threshold for glucose has been exceeded. In contrast, a pH of 6.0 is within the normal range for urine, which can vary from about 4.5 to 8.0. A protein level of 30 mg/dL is also abnormal, as normal protein excretion in urine is typically less than 20 mg/dL. The presence of protein in the urine may indicate renal pathology. Lastly, a creatinine level of 1.0 mg/dL is within the normal range for plasma creatinine, which is 0.8-1.2 mg/dL for males and 0.6-0.9 mg/dL for females, but the normal range in urine will be higher due to concentration of urine during its formation, and it will be dependent on muscle mass and dietary intake.