Table 2.
Reliability of accelerometer-based methods, sorted by methodological study quality, study result rating and quality of evidence
| Study | Study populationa | Outcome(s) & Setting | Time interval | Methodological study qualityb | Placement | Device-based methodc | Results | Study result ratingd | Quality of evidencee |
|---|---|---|---|---|---|---|---|---|---|
| Hager et al. (2016) [42] |
Toddlers n = 24 * 2 Ac Age = 24.5 ± 5.2 (14.7 to 35.5) months Sex = 41.7% girls |
Activity counts Laboratory (structured activities) |
n.a | A | Non-dominant ankle; side-by-side | Ac-cts-omni-60 | ICC? = .98 | + | Low |
| Aadland & Johannessen (2015) [65] |
Preschoolers n = 91 Age = 4.07 ± 0.5 (3 to 5) years Sex = 51% girls |
Total PA, SB, LPA and MVPA in min/day and % of valid wear time Free-living |
14 days | A | Not reported | AG-Ev-VA-10 |
ICC−(1,1) ≥ .75 for all outcomes across all wear criteria (≥ 6, 8 and 10 h/day and ≥ 3 and 5 days/week) Except for SB (min/day): ICC−(1,1) .61 to .81 Higher ICC−(1,1) for percentages than absolute values ICC−(1,1) ≥ .80 (≥ 6 and ≥ 8 h/day) > 7 days required ICC−(1,1) ≥ .80 (≥ 10 h/day) within 7 days: 3.9 to 7.1 days |
+ (SB + ; PA +) |
Low |
| Greenspan, Cunha, & Lobo (2021) [29] |
Infants n = 16 Age = 3.1 ± 1.1 (1.8 to 5) months Sex = 51% girls |
Body position: supine, reclined, upright, inclined, and prone Free-living (structured play) |
0 days | I | Trunk | GG-Gr-HA/VA/DA-1 |
κw = .89, 95% CI (.87 to .91) Supine: agreement = 89.2% Reclined: agreement = 72.6% Upright: agreement = 90.9% Inclined: agreement = 84.6% Prone: agreement = 91.1% |
+ | Very low |
Abbreviations: Ac Actical, AG ActiGraph, cpm counts per minute, cts counts, DA diagonal axis (z-axis), Ev Evenson’s cut-points (2008) [91], GG get around garment with ADXL335, Gr Greenspan’s cut-points (2021) [29], HA horizontal axis (x-axis), ICC? intraclass correlation coefficient analysis decision was unclear, ICC−(1,1) intraclass correlation coefficient inappropriate analysis decision one-way random effects model, κwweighted Kappa, LPA light physical activity, MVPA moderate-to-vigorous physical activity, n.a. not applicable, omni omnidirectional, PA physical activity, r unknown correlation coefficient, SB sedentary behavior, VA vertical axis (y-axis), 1 1 s epoch, 10 10 s epoch, 60 60 s epoch
aAge presented as mean ± SD (range)
bMethodological study quality based on newly developed checklist: VG very good, A adequate, D doubtful, I inadequate
cDevice-based method described using code combinations of four elements resulting in the following format: brand-axis-approach-epoch length
dStudy result rating based on COSMIN guideline: + sufficient, ± inconsistent, - insufficient, ? intermediate
eQuality of evidence based on GRADE approach