Table 2 Descriptive statistics of ambulation indices by weight status
Combined (n = 263) | Under-Normal weight (n = 122) | Overweight-Obese (n = 141) | p-valued | |
|---|---|---|---|---|
Number of days monitored | ||||
All | 5.5 (1.6) | 5.4 (1.6) | 5.4 (1.6) | 0.5560 |
Weekdays | 3.7 (1.2) | 3.8 (1.2) | 3.7 (1.2) | 0.2037 |
Weekend days | 1.7 (0.6) | 1.7 (0.7) | 1.7 (0.6) | 0.4095 |
Average steps per day | 13,568 (3571) | 13,817 (3599) | 13,353 (3545) | 0.2937 |
Total walking bouts ≥ 1 min (bouts/day) | 78 (17) | 80 (17) | 76 (17) | 0.0629 |
Longest walking bout ≥ 1 min (minutes) | 146 (70) | 144 (66) | 150 (69) | 0.4672 |
Peak 1-min cadence (steps/min) | 114 (13) | 116 (13) | 112 (12) | 0.0063 |
Peak non-consecutive 30-min cadence (steps/min) | 93 (14) | 94 (14) | 91 (13) | 0.0564 |
Peak consecutive 30-min cadence (steps/min) | 63 (16) | 64 (16) | 62 (16) | 0.2932 |
Time in cadence band (min/day)a | ||||
0 steps/min | 273 (123) | 289 (105) | 248 (117) | 0.0006 |
1–19 steps/min (Incidental movement) | 332 (76) | 324 (62) | 341 (80) | 0.0112 |
20–39 steps/min (Sporadic movement) | 108 (50) | 110 (46) | 106 (52) | 0.6449 |
40–59 steps/min (Purposeful steps) | 47 (26) | 47 (25) | 47 (28) | 0.8888 |
60–79 steps/min (Slow walking) | 22 (11) | 21 (10) | 22 (12) | 0.9948 |
80–99 steps/min (Medium walking) | 19 (15) | 20 (13) | 19 (17) | 0.8434 |
100–119 steps/min (Brisk walking) | 17 (17) | 19 (17) | 13 (15) | 0.0096 |
≥ 120 steps/min (Including all faster ambulation) | 1 (3) | 1 (4) | 1 (2) | 0.0209 |
Walking patternb | ||||
Bout length | ||||
S2w | 1.167 (0.116) | 1.154 (0.115) | 1.178 (0.115) | 0.0894 |
G | 0.589 (0.046) | 0.584 (0.045) | 0.594 (0.046) | 0.0861 |
Cadence | ||||
Bouted S2w | 1.274 (0.099) | 1.292 (0.083) | 1.258 (0.108) | 0.0050 |
Bouted G | 0.631 (0.038) | 0.638 (0.031) | 0.625 (0.420) | 0.0040 |
Unbouted S2w | 1.394 (0.107) | 1.400 (0.108) | 1.389 (0.106) | 0.3971 |
Unbouted G | 0.675 (0.037) | 0.677 (0.037) | 0.673 (0.037) | 0.4011 |
Bout characteristics for step cadence ≥ 100 steps/mina | ||||
Total walking bouts ≥ 1 min (bouts/day−1) | 7 (6) | 8 (4) | 5 (5) | 0.0179 |
Maximum bout duration ≥ 1 min (minutes) | 5.3 (5.8) | 6.0 (5.5) | 4.5 (5.7) | 0.0463 |
Proportion of all walking bouts (%) | ||||
≥ 1 min bout | 7.7 (7.6) | 8.4 (7.1) | 7.1 (8.1) | 0.0666 |
1 min bout | 3.2 (3.3) | 3.6 (2.9) | 2.9 (3.9) | 0.0960 |
2 min bout | 1.5 (1.7) | 1.6 (1.7) | 1.3 (1.6) | 0.0941 |
5 min bout | 0.3 (0.6) | 0.3 (0.6) | 0.3 (0.6) | 0.2617 |
≥ 10 min bout | 0.3 (0.7) | 0.3 (0.9) | 0.2 (0.6) | 0.1413 |