Correction
Content of correction Some errors were identified in the original publication [1], primarily stemming from rounding inaccuracies or failure to update tables/figures after implementing changes.
– In Table 3, discrepancies were found where the Weekly METS was expressed in minutes, but the difference was expressed in hours. An updated Table 3 (provided below) presents all results consistently in minutes and hours; one corrected value is highlighted in bold.
Table 3
Participants Baseline and Follow-up Physical Activity, by Group.
| PHYSICAL ACTIVITY | PEER MENTORED GROUP | CONTROL GROUP | P-VALUE# | ||||||
|---|---|---|---|---|---|---|---|---|---|
| BASELINE | FOLLOW-UP | DIFFERENCE | P-VALUE* | BASELINE | FOLLOW-UP | DIFFERENCE | P-VALUE* | ||
| Weekly METS (min) | 9443.8 ± 4123.9 | 10750.3 ± 3751.4 | + 1306.5 | 0.006 | 11131.4 ± 4304.4 | 10366.3 ± 3052.9 | –765.1 | 0.03 | 0.0005 |
| Weekly METS (hr) | 157.4 ± 68.7 | 179.2 ± 62.5 | + 21.8 | 0.006 | 185.5 ± 71.7 | 172.8 ± 50.9 | –12.7 | 0.03 | 0.0005 |
| Duration of moderate physical activity (min) | 347.1 ± 458.9 | 776.0 ± 697.7 | + 428.9 | <0.0001 | 480.2 ± 577.8 | 804.6 ± 800.4 | +324.4 | <0.001 | 0.30 |
| Duration of moderate physical activity (hr) | 5.8 ± 7.6 | 12.9 ± 11.6 | + 7.1 | <0.0001 | 8.0 ± 9.63 | 13.4 ± 13.3 | +5.4 | <0.001 | 0.30 |
| Duration of vigorous physical activity (min) | 85.0 ± 213.2 | 169.3 ± 332.9 | + 84.3 | 0.003 | 120.3 ± 368.4 | 155.6 ± 442.1 | +35.3 | 0.34 | 0.18 |
| Duration of vigorous physical activity (hr) | 1.4 ± 3.6 | 2.8 ± 5.5 | + 1.4 | 0.003 | 2.0 ± 6.1 | 2.6 ± 7.4 | +0.6 | 0.34 | 0.18 |
[i] Difference = difference between means. Min = minutes; hr = hours. P-value* = P-value comparing the mean values within each group, with a paired t-test. P-value# = P-value comparing the difference in mean values between the groups, with a t-test.
– Table 5 contained two inaccuracies; specifically, the difference in the control group was –0.004 for waist-to-hip ratio (not –0.0009), and –0.2 for visceral fat (not +0.2). In the updated Table 5 (provided below) these corrected values are highlighted in bold.
Table 5
Impact of physical activity on participants cardiometabolic parameters.
| CARDIOMETABOLIC PARAMETERS | PEER MENTORED GROUP | CONTROL GROUP | P-VALUE# | ||||||
|---|---|---|---|---|---|---|---|---|---|
| BASELINE | FOLLOW-UP | DIFFERENCE | P-VALUE | BASELINE | FOLLOW-UP | DIFFERENCE | P-VALUE | ||
| Weight, kg | 89.5 ± 14.2 | 89.1 ± 14.5 | – 0.4 | 0.24 | 88.6 ± 15.3 | 87.8 ± 14.7 | – 0.8 | 0.07 | 0.42 |
| BMI, kg/m2 | 33.2 ± 6.6 | 33.0 ± 6.6 | – 0.2 | 0.23 | 31.9 ± 5.4 | 31.6 ± 5.3 | – 0.3 | 0.07 | 0.48 |
| Waist-Hip Ratio | 0.927 ± 0.05 | 0.910 ± 0.07 | –0.017 | 0.002 | 0.919±0.06 | 0.915±0.07 | –0.004 | 0.83 | 0.014 |
| Total body fat, % | 41.3 ± 8.3 | 41.4 ± 9.2 | + 0.1 | 0.63 | 40.4 ± 9.4 | 39.6 ± 9.7 | – 0.8 | 0.02 | 0.09 |
| Visceral fat, % | 11.5 ± 4.0 | 11.3 ± 3.6 | – 0.2 | 0.55 | 11.3 ± 4.2 | 11.1 ± 3.8 | – 0.2 | 0.93 | 0.67 |
| Skeletal muscle, % | 26.2 ± 4.7 | 26.3 ± 4.8 | + 0.1 | 0.84 | 26.5 ± 5.1 | 26.8 ± 5.3 | + 0.3 | 0.11 | 0.49 |
| Cholesterol, mg/dl | 204.1 ± 43.3 | 183.8 ± 38.8 | – 20.3 | <0.0001 | 207.2 ± 43.9 | 182.4 ± 40.4 | – 24.8 | <0.0001 | 0.29 |
| Triglycerides, mg/dl | 123.7 ± 59.8 | 101.1 ± 45.0 | – 22.6 | <0.0001 | 132.2 ± 77.2 | 102.4 ± 50.5 | – 29.8 | <0.0001 | 0.81 |
| LDL-Chol | 133.8 ± 41.0 | 113.3 ± 36.1 | – 20.5 | <0.0001 | 136.8 ± 39.7 | 113.0 ± 37.3 | – 23.8 | <0.0001 | 0.63 |
| HDL-Chol | 44.4 ± 9.9 | 50.1 ± 7.6 | + 5.7 | <0.0001 | 44.2 ± 16.8 | 48.9 ± 8.3 | + 4.7 | <0.0001 | 0.72 |
[i] LDL = low-density lipoproteins. HDL = high-density lipoproteins. Chol = cholesterol. Difference = difference between means. P-value* = P-value comparing the mean values within each group, with a paired t-test. P-value# = P-value comparing the difference in mean values between the groups, with a t-test.
– Figure 3 was revised to clarify the direction of change for each parameter.
Figure 3
Change in cardiometabolic parameters by group.
a. change in low-density lipoproteins (LDL). b. change in triglycerides. c. change in cholesterol. d. change in high-density lipoproteins (HDL).
We emphasize that due to the culture at the enrolment site, the observations are not dependent within the same office space.
These corrections do not change the overall results or conclusions.
Acknowledgements
We thank Michael Zhong at the Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, for reviewing the results; and Deependra Thapa and David Allison at Indiana University, Bloomington, for identifying errors in Table 3.
Competing interests
The authors have no competing interests to declare.