"mean of differences" is correct and can be used in written English.
For example, "The mean of differences in the data set is 0."
Blood lead concentrations ranged from 2.1 to 3.9 microg/dl in the children and between 1.8 and 4.5 microg/dl in the mothers, but the mean of differences between each mother and her child did not differ significantly from zero.
Similarly, fewer T cells detected by IHC were observed in brain metastases than primary lung cancers (mean of differences −12, SD 16; p = 0.003).
In responders, the mean of differences in pre- and post-salbutamol FEV1values after zafirlukast was 0.077 l, whereas the mean of differences between post-salbutamol values after zafirlukast and those after placebo was −0.064 l.
Overall, there was no significant difference in Pielou's Evenness (mean of differences −0.004778, 95% CI −0.02 to 0.01; p = 0.51) or Simpson's Diversity Index (mean of differences 0.002, 95% CI 0.001 to 0.004; p = 0.05) between primary and metastatic pairs, but scores for these indices were very low overall.
Both iChao1 (mean of differences −20,355, 95% CI −29,561 to −11,149; p = 0.0002) and the Efron-Thisted Estimator (mean of differences −14,273, 95% CI −21331 to −7216; p = 0.0004) estimated that there is a significant decrease in the number of unique productive T cell clones in metastatic lesions.
No significant correlations between mean of differences and average of basal and SS EGP, SS insulin concentration, and M between the 2 clamps were observed.
We also got the annual mean of daily temperature difference by calculating the mean of difference between daily maximum and minimum temperature.
The hysteresis data for emptying and filling the tank process yields the mean of difference 20% for one-layer membrane.
For better comparison, the mean of difference for each set is calculated in the last column.
Critical difference at 5% level of significance was calculated for comparing the mean of difference presented in the summary table.
In the Bland-Altman plot, solid and broken lines show mean of difference and its respective 2SD, respectively.
