Table 3.
Three statistical comparisons of hemoglobin concentrations derived from HemoCue analyses of capillary blood samples with concentrations derived from HemoCue analyses of venous blood samples from toddlers in Kansas City and pregnant women in Cleveland.
| Statistical Comparisons | Kansas City (n = 402) | Cleveland (n = 397) |
|---|---|---|
| Correlation coefficient | 0.72 (0.67, 0.76) | 0.81 (0.77, 0.84) |
| Mean paired difference for capillary minus venous hemoglobin (95% limits of agreement), g/dL | 0.33 1 (−0.99, 1.66) | 0.44 1 ( 0.96, 1.84) |
| % of participants for whom the difference in Hb values derived from the 2 methods divided by the mean Hb value of the 2 methods was <5% 2 | 59.6 (71.9, 80.3) | 55.9 (50.9, 60.9) |
1 Paired t-test, p < 0.05; 2 Number of participants ((difference between two methods/mean of two methods) <0.05)/all participants.