mean difference


Also found in: Wikipedia.

mean difference

[′mēn ′dif·rəns]
(statistics)
The average of the absolute values of the n (n- 1)/2 differences between pairs of elements in a statistical distribution that has n elements.
References in periodicals archive ?
The researchers found that the mean Disabilities of Arm, Shoulder, and Hand (DASH) score (0 best, 100 worst) at two years was 18.5 points for the operative treatment group and 17.4 points for the nonoperative group (mean difference, 1.1; 95 percent confidence interval, −7.8 to 9.4; P = 0.81).
Mean difference of 8207.5+-796.95 cells/mm3 was noted between infected and non-infected animals group which is a significant increase with p-value = 0.071 < ([alpha] = 0.10).
The mean age of the participants was 22.2+-3.0 (Table 1).Paired sample T-test was used to compare the mean difference between different visual analogue scales.
confidence interval, 0.8%-2.0%) in long-term opioid users between primary care service areas (PCSAs) with the highest concentrations of primary care providers versus those with the lowest, and there was just a 0.6% mean difference (95% CI, -0.1% to 1.3%) between PCSAs with the highest concentrations of rheumatologists and those with the lowest.
Is there any significant mean difference and variation between newly entrants' external expectations (EE) and experience?
The results showed that pain was reduced to a similar extent in both groups, with a mean difference in pain score between the treatments of 0.
A blinded physician visually rated the effects of saline versus hyaluronidase at 4 weeks and found a significant difference between assessments of the hyaluronidase-treated sites and saline control sites at 4 weeks, favoring the hyaluronidase sites for visual detection (mean difference, 1.15; P less than .001) and palpability (mean difference, 1.22; P less than .001).
For continuous outcomes, standard mean difference (SMD) with 95% confidence intervals (CIs) of serum PCT and CRP were calculated.
Results: Mean difference between preoperative and 6 months postoperative Lysholm scores was 30.04 +- 13.42 (p<0.001) and mean difference in Tegner activity scale was 2.88 +- 1.11 (p90) was obtained in 40 (77%) patients, good score (84-90) in 1 (2%), fair score (65-83) in 7 (13%) and poor score (<65) in 4 (8%) of patients (figure).
Table 4 Significance of mean difference between low achieving students of both the groups on post-test.
We used independent sample f-test to analyze the mean difference in both systolic and diastolic blood pressure between each gender and between smoking statuses.