Table 2.
Daily mean values and Pearson's correlations between hip and wrist accelerometer measures, during pregnancy and postpartum.
| Wrist |
|||||||
|---|---|---|---|---|---|---|---|
| T2 (n = 31) | Axis 1 cpm | Axis 2 cpm | Axis 3 cpm | Vector magnitude counts/day | Steps/day | ||
| Daily mean total (sd) | 16,855.44 (6695.2) | 17,309.8 (6273.5) | 20,608.18 (7726.7) | 1,595,614.0 (467,866.4) | 7085.74 (1979.3) | ||
| Hip | Axis 1 cpm | 2927.4 (1312.7) | 0.59 | 0.57 | 0.56 | 0.58 | 0.71 |
| Axis 2 cpm | 3247.1 (1544.9) | 0.70 | 0.68 | 0.66 | 0.68 | 0.76 | |
| Axis 3 cpm | 4020.5 (1907.9) | 0.67 | 0.64 | 0.62 | 0.65 | 0.71 | |
| Vector magnitude counts/day | 290,195.0 (102,539.8) | 0.70 | 0.68 | 0.66 | 0.68 | 0.78 | |
| Steps/day | 3654.0 (1598.9) | 0.96 | 0.94 | 0.78 | 0.78 | 0.77 | |
| Wrist |
|||||||
|---|---|---|---|---|---|---|---|
| T3 (n = 62) | Axis 1 cpm | Axis 2 cpm | Axis 3 cpm | Vector magnitude counts/day | Steps/day | ||
| Daily mean value (sd) | 15,339.0 (5544.4) | 15,870.8 (5148.7) | 18,822.1 (6897.9) | 1,751,923.0 (608,144.9) | 7554.2 (2424.7) | ||
| Hip | Axis 1 cpm | 2572.52 (1089.3) | 0.64 | 0.59 | 0.56 | 0.60 | 0.62 |
| Axis 2 cpm | 2538.979 (950.5) | 0.73 | 0.68 | 0.72 | 0.72 | 0.76 | |
| Axis 3 cpm | 3256.887 (1373.2) | 0.79 | 0.73 | 0.75 | 0.77 | 0.77 | |
| Vector magnitude counts/day | 301,063.4 (112,410.1) | 0.82 | 0.76 | 0.77 | 0.79 | 0.80 | |
| Steps/day | 3522.94 (1286.3) | 0.67 | 0.59 | 0.59 | 0.62 | 0.74 | |
| Wrist |
|||||||
|---|---|---|---|---|---|---|---|
| Postpartuma (n = 55) | Axis 1 cpm | Axis 2 cpm | Axis 3 cpm | Vector magnitude counts/day | Steps/day | ||
| Daily mean value (sd) | 18,457.6 (7361.5) | 18,778.0 (6923.7) | 22,392.7 (8249.3) | 2,083,842.8 (776,000.3) | 9208.7 (3254.3) | ||
| Hip | Axis 1 cpm | 3289.7 (1427.8) | 0.72 | 0.73 | 0.71 | 0.73 | 0.75 |
| Axis 2 cpm | 3784.3 (1690.1) | 0.80 | 0.80 | 0.77 | 0.80 | 0.80 | |
| Axis 3 cpm | 4680.6 (2032.2) | 0.84 | 0.84 | 0.81 | 0.84 | 0.80 | |
| Vector magnitude counts/day | 421,463.6 (174,410.1) | 0.83 | 0.83 | 0.80 | 0.83 | 0.84 | |
| Steps/day | 4642.2 (2056.2) | 0.80 | 0.78 | 0.77 | 0.79 | 0.84 | |
T2: trimester 2; T3: trimester 3; PP: postpartum; cpm: counts per minute; sd: standard deviation; a: aggregated for women providing at least one time point during postpartum period.