Table 2.
Fitted coefficients from random effects meta-regression of the difference in mean hemoglobin (g/L), non-DHS survey less DHS survey, in each survey pair. Two regressions were fitted, one for non-pregnant women or women pregnancy status was not reported, and one for preschool-aged children. Indicator variables were included when the type of blood collection or analytic approach used by the non-DHS survey differed from that of its near-in-time DHS survey. The intercept corresponds to the difference in mean haemoglobin when both surveys collected blood via capillary puncture and analyzed haemoglobin using the same HemoCue® model (either confirmed or suspected)
| Differing survey method (indicator variables) | Number of survey pairs | Fitted regression coefficient and 95% CI (g/L) | P-value |
|---|---|---|---|
|
Non-pregnant women/women (n=13 study pairs)
| |||
| Venipuncture (non-DHS) vs. capillary puncture (DHS) |
9 |
0.4 (-1.9, 2.8) |
0.712 |
| HemoCue® Hb 301 (non-DHS) vs. HemoCue® Hb 201+ (DHS) |
5 |
5.8 (3.2, 8.3) |
<0.001 |
| Laboratory-based methods (non-DHS) vs. any HemoCue® (DHS) |
3 |
-4.6 (-7.5, -1.8) |
0.001 |
| Intercept |
|
-0.8 (-3.5, 1.8) |
0.536 |
|
Preschool-aged children (n=17)
| |||
| Venipuncture (non-DHS) vs. capillary puncture (DHS) |
8 |
3.8 (0.8, 6.7) |
0.012 |
| HemoCue® Hb 301 (non-DHS) vs. HemoCue® Hb 201+ (DHS) |
6 |
4.3 (1.4, 7.2) |
0.004 |
| Laboratory-based methods (non-DHS) vs. any HemoCue® (DHS) |
2 |
-4.2 (-8.8, 0.4) |
0.075 |
| Intercept | 2.1 (0.0, 4.2) | 0.053 | |