Table 2.
Physical activity data measured objectively using the GT3X Actigraph and subjectively using the Global Physical Activity Questionnaire (GPAQ) (mean ± SD)
| Variables | AMD subjects with vision loss (n = 11) | AMD subjects without vision loss (n = 10) |
Controls with normal vision (n = 11) | ANOVA p-value |
|---|---|---|---|---|
| Actigraph | ||||
| Total wear time (min/day) | 838 (75) | 873 (61) | 880 (62) | 0.298 |
| Number of valid wear days | 6.9 (0.3) | 6.8 (0.4) | 6.9 (0.3) | 0.710 |
| Sedentary behaviour (min/day) | 462 (64) | 443 (52) | 424 (94) | 0.482 |
| Light-intensity activity (min/day) | 224 (73) | 285 (81) | 241 (32) | 0.103 |
| MVPA (min/day) | 143 (40)* | 145 (36)* | 216 (87) | 0.011 |
| Step count (steps/day) | 6218 (3159) | 5199 (2529) | 8258 (4931) | 0.173 |
| GPAQ | ||||
| Sedentary behaviour (min/day) | 234 (113) | 323 (126) | 264 (102) | N/A |
| MVPA (min/day) | 102 (78) | 127 (92) | 92 (50) | N/A |
| Bias1 Actigraph vs. GPAQ | ||||
| Sedentary behaviour (min/day) | 228 (118) | 119 (106) | 160 (132) | 0.127 |
| MVPA (min/day) | 40 (93)* | 18 (117)* | 124 (86) | 0.048 |
MVPA, moderate-to-vigorous physical activity; N/A, not applicable; 1, difference score between the objective and subjective measure of physical activity; *, significantly different from controls with normal vision (p < 0.05)