Table 3 Optimal steps/day from ROC analysis and Colley et al. thresholds a for censored and uncensored steps by activity cut point for children and adolescents
Children | ||||||
|---|---|---|---|---|---|---|
Freedson 3 METS | Freedson 4 METS | Evenson | ||||
Optimal | Colleya | Optimal | Colleya | Optimal | Colleya | |
Censored | ||||||
Boys 6–11 yrs | 6,500 | 12,000 | 9,500 | 12,000 | 10,500 | 12,000 |
FP/FNb | (0%/6%) | (0%/68%) | (17%/21%) | (0%/59%) | (19%/20%) | (5%/39%) |
Accuracy | .94 | .35 | .80 | .56 | .81 | .80 |
AUC | .99 (.98–1.0) | .91 (.88–.94) | .90 (.87–.93) | |||
Girls 6–11 yrs | 6,500 | 12,000 | 9,000 | 12,000 | 10,500 | 12,000 |
FP/FNb | (0%/15%) | (0%/83%) | (15%/21%) | (1%/74%) | (21%/15%) | (6%/42%) |
Accuracy | .85 | .19 | .81 | .55 | .80 | .86 |
AUC | .88 (.85–.91) | .90 (.88–.93) | .88 (.85–.92) | |||
Uncensored | ||||||
Boys 6–11 yrs | 8,500 | 12,000 | 12,000 | 12,000 | 13,000 | 12,000 |
FP/FNb | (9%/6%) | (0%/33%) | (20%/21%) | (20%/21%) | (26%/21%) | (43%/9%) |
Accuracy | .94 | .68 | .79 | .79 | .76 | .72 |
AUC | .99 (.97–1.0) | .88 (.85–.92) | .86 (.83–.90) | |||
Girls 6–11 yrs | 8,500 | 12,000 | 11,500 | 12,000 | 13,500 | 12,000 |
FP/FNb | (0%/9%) | (0%/48%) | (24%/19%) | (17%/27%) | (22%/27%) | (42%/11%) |
Accuracy | .91 | .53 | .79 | .77 | .77 | .65 |
AUC | .97 (.95–1.0) | .87 (.84–.90) | .84 (.80–.89) | |||
Adolescents | ||||||
Freedson 3 METS | Freedson 4 METS | Evenson | ||||
Optimal | Colley a | Optimal | Colley a | Optimal | Colley a | |
Censored | ||||||
Boys 12–17 yrs | 8,500 | 12,000 | 11,500 | 12,000 | 10,500 | 12,000 |
FP/FNb | (21%/21%) | (1%/68%) | (11%/14%) | (8%/22%) | (15%/21%) | (3%/34%) |
Accuracy | .79 | .61 | .88 | .90 | .83 | .90 |
AUC | .99 (.97–1.0) | .93 (.91–.96) | .93 (.91–.95) | |||
Girls 12–17 yrs | 7,500 | 12,000 | 9,000 | 12,000 | 9,500 | 12,000 |
FP/FNb | (23%/16%) | (0%/82%) | (18%/19%) | (4%/52%) | (12%/13%) | (2%/41%) |
Accuracy | .79 | .78 | .82 | .95 | .88 | .95 |
AUC | .88 (.86–.91) | .87 (.78–.96) | .93 (.88–.98) | |||
Uncensored | ||||||
Boys 12–17 yrs | 11,000 | 12,000 | 14,000 | 12,000 | 13,000 | 12,000 |
FP/FNb | (28%/24%) | (16%/38%) | (15%/17%) | (34%/6%) | (21%/19%) | (29%/13%) |
Accuracy | .74 | .72 | .84 | .70 | .80 | .75 |
AUC | .84 (.82–.87) | .91 (.88–.94) | .89 (.87–.92) | |||
Girls 12–17 yrs | 10,500 | 12,000 | 11,500 | 12,000 | 12,000 | 12,000 |
FP/FNb | (24%/24%) | (9%/52%) | (23%/19%) | (19%/24%) | (17%/18%) | (17%/18%) |
Accuracy | .76 | .79 | .77 | .81 | .83 | .83 |
AUC | .85 (.81–.88) | .84 (.73–.95) | .90 (.83–.96) | |||