Table.

Haemoglobin concentration thresholds (g/L) for classification of anaemia severity by age, sex, and pregnancy status

	Mild anaemia	Moderate anaemia	Severe anaemia
0–6 days
Males	145–159	100–144	<100
Females	145–159	100–144	<100
7–27 days
Males	120–134	85–119	<85
Females	120–134	85–119	<85
1 month–4 years
Males	100–109	70–99	<70
Females	100–109	70–99	<70
5 – 14 years
Males	110–114	80–109	<80
Females	110–114	80–109	<80
≥15 years
Males	110–129	80–109	<80
Females, non–pregnant	110–119	80–109	<80
Females, pregnant	100–109	70–99	<70

Published WHO thresholds²³ were used for males and females aged 6 months and older; thresholds for those younger than 6 months were imputed as described in the appendix (p 6).