Table 2.
Hb concentration and prevalence of anaemia according to the standard method and the test method in children aged 6 to 59 months (n 351) by age group (Rio de Janeiro, 2014)
| Method | Hb (g/dl)* | Prevalence of anaemia (%) | ||||
|---|---|---|---|---|---|---|
| Mean | sd | Median | Variance | Interquartile range | ||
| Children <2 years | ||||||
| Standard† | 11·52 | 0·99 | 11·50 | 1·00 | 1·40 | 32·9‡ |
| Test§ | 11·70 | 1·06ǁ | 11·70 | 1·13 | 1·40 | 29·1‡ |
| Children ≥2 years | ||||||
| Standard† | 12·14 | 0·87 | 12·10 | 0·75 | 1·20 | 7·8‡ |
| Test§ | 12·31 | 1·08ǁ | 12·40 | 1·18 | 1·60 | 11·9‡ |
| Total | ||||||
| Standard† | 11·86 | 0·97 | 11·80 | 0·95 | 1·30 | 19·1‡ |
| Test§ | 12·04 | 1·11ǁ | 12·00 | 1·25 | 1·50 | 19·7‡ |
To convert Hb in g/dl to mmol/l, multiply by 0·6206.
Standard method: Hb concentration in venous blood sample analysed by automated system (XS1000i Sysmex®).
No statistically signficant difference (P > 0·05) between prevalences of anaemia obtained by the standard method and the test method (McNemar's χ2 test).
Test method: Hb concentration in capillary blood sample analysed by portable haemoglobinometer (HemoCue® Hb 301).
Statistically significant difference (P < 0·05) between the mean Hb concentration obtained by the standard method and the test method (Student's t test for paired samples).