Table 1 Mean difference comparisons between observed haemoglobin and estimated haemoglobin (Haematocrit/3, expressed as "g of haemoglobin/dl")
Observed Haemoglobin (n = 120) | Estimated Haemoglobin (Haematocrit/3) (n = 120) | |
|---|---|---|
Mean | 12.06 | 12.62 |
Standard deviation | 1.71 | 1.87 |
Standard error | 0.16 | 0.17 |
One-sample test | ||
t | 77.23 | 73.94 |
Mean difference | 12.06 | 12.62 |
95% CI of the difference | 11.75 to 12.37 | 12.28 to 12.95 |
P | <0.001 | <0.001 |
Independent-sample test | ||
t | - | -2.399 |
Mean difference | - | -0.555 |
95% CI of the difference | - | -1.017 to -9.9328E-02 |
P | - | 0.017 |
Paired-sample test | ||
t | - | -14.284 |
Mean difference | - | -0.555 |
95% CI of the difference | - | -0.6319 to -0.4781 |
P | - | <0.001 |