Age

Sex

Reference Values

Critical Low

Critical High

0 – 3 days

Female

14.5 – 22.5 g/dL

≤ 7 g/dL

NA

3 days – 2 weeks

12.5 – 20.5 g/dL

≤ 7 g/dL

NA

2 weeks – 1 month

10 – 18 g/dL

≤ 7 g/dL

NA

1 month – 6 months

9 – 14 g/dL

≤ 7 g/dL

NA

6 months – 2 years

10.5 – 13.5 g/dL

≤ 7 g/dL

NA

2 – 6 years

11.5 – 13.5 g/dL

≤ 7 g/dL

NA

6 – 12 years

11.5 – 13.5 g/dL

≤ 7 g/dL

NA

12 – 18 years

11.9 – 15.5 g/dL

≤ 6 g/dL

NA

>18 years

11.9 – 15.5 g/dL

≤ 6.5 g/dL

≥ 19.9 g/dL

0 – 3 days

Male

14.5 – 22.5 g/dL

≤ 7 g/dL

NA

3 days – 2 weeks

12.5 – 20.5 g/dL

≤ 7 g/dL

NA

2 weeks – 1 month

10 – 18 g/dL

≤ 7 g/dL

NA

1 month – 6 months

9 – 14 g/dL

≤ 7 g/dL

NA

6 months – 2 years

1.5 – 13.5 g/dL

≤ 7 g/dL

NA

2 – 6 years

11.5 – 13.5 g/dL

≤ 7 g/dL

NA

6 – 12 years

11.5 – 15.5 g/dL

≤ 7 g/dL

NA

12 – 18 years

13 – 17.5 g/dL

≤ 6 g/dL

NA

>18 years

13 – 17.5 g/dL

≤ 6.5 g/dL

≥ 19.9 g/dL

Any age

Unknown

NA

≤ 6.5 g/dL

≥ 19.9 g/dL