Table 2. Results of moderator analyses for criterion-related validity correlation coefficients across the 20-m shuttle run test protocols potentially affected by moderator effects† 
| Moderator | 
Effect | 
K | 
N | 
rc | 
rp | 
95% CIa | 
95% CVb | 
% variancec | 
Q statistic | 
| Between-study analyses | 
| Sex of participants | 
| Légerd | 
Men | 
24 | 
782 | 
.80 | 
.88 | 
.81-.94 | 
0.59-1.00 | 
18.35 | 
124.53* | 
 | 
Women | 
13 | 
475 | 
.74 | 
.81 | 
.70-.92 | 
0.50-1.00 | 
21.56 | 
55.14* | 
| Eurofite | 
Men | 
6 | 
125 | 
.61 | 
.68 | 
.49-.87 | 
0.41-0.95 | 
57.29 | 
5.44 | 
 | 
Women | 
4 | 
98 | 
.67 | 
.75 | 
.53-.97 | 
0.38-1.00 | 
32.74 | 
10.00* | 
| Age of participants | 
| Légerd | 
Children | 
28 | 
1,335 | 
.72 | 
.78 | 
.72-0.85 | 
0.50-1.00 | 
22.30 | 
113.74* | 
 | 
Adults | 
20 | 
887 | 
.86 | 
.94 | 
.87-1.00 | 
0.72-1.00 | 
12.72 | 
160.02* | 
| Eurofite | 
Children | 
7 | 
143 | 
.61 | 
.68 | 
.52-.84 | 
0.50-0.86 | 
76.18 | 
2.66 | 
 | 
Adults | 
4 | 
135 | 
.71 | 
.79 | 
.56-1.00 | 
0.43-1.00 | 
24.49 | 
15.00* | 
| Level of VO2max | 
| Légerd | 
Low | 
22 | 
1,181 | 
.75 | 
.82 | 
.74-.89 | 
0.49-1.00 | 
13.27 | 
167.60* | 
 | 
High | 
23 | 
895 | 
.80 | 
.88 | 
.80-.95 | 
0.62-1.00 | 
18.84 | 
115.48* | 
| Eurofite | 
Low | 
5 | 
108 | 
.69 | 
.77 | 
.59-.94 | 
0.41-1.00 | 
36.29 | 
10.68* | 
 | 
High | 
6 | 
170 | 
.64 | 
.71 | 
.52-.91 | 
0.45-0.98 | 
48.32 | 
7.81 | 
| Within-study analysis | 
| Number of predictorsf | 
| Légerd | 
One | 
8 | 
742 | 
.70 | 
.77 | 
.68-.86 | 
0.51-1.00 | 
15.56 | 
50.61* | 
 | 
Few | 
8 | 
742 | 
.80 | 
.88 | 
.80-.95 | 
0.67-1.00 | 
12.60 | 
64.68* | 
* p < 0.05
f Performance only score (“one”) or performance score plus other (“few”). † Because some studies mixed categories or some values were missing, the overall n for some categories is lower for some 20-m shuttle run tests.
eEurofit protocol starts at 8.0 km/h and increases 0.5 km/h each minute, but the second stage increases by 1.0 km/h (Council of Europe Committee for the Development of Sport, 1988)
dLéger’s protocol starts at 8.5 km/h and increases 0.5 km/h each minute (Léger et al., 1984, 1988)
a95% confidence interval
b95% credibility interval
cPercentage of variance accounted for by statistical artefacts including sampling error and measurement error of the 20-m shuttle run testNote. K, number of rs; N, total sample size; r
c, overall weighted mean of r corrected for sampling error only; r
p, overall weighted mean of r corrected for sampling error and measurement error of the 20-m shuttle run test; VO
2max, maximal oxygen uptake