Table 2 Number and percentage of the subjects (self-reported workers) who had both questionnaire and GPS tracking data for at least one valid GPS day a
| Â | Any pregnancy period | <20Â weeks | 20-30Â weeks | >30Â weeks | Two or three pregnancy periods | All three pregnancy periods | Total person-weeks |
|---|---|---|---|---|---|---|---|
Number of subjects | 56 (100.0%) | 49 (100.0%) | 44 (100.0%) | 24 (100.0%) | 45 (100.0%) | 16 (100.0%) | 117 |
Had ≥2 valid GPS days | 55 (98.2%) | 44 (89.8%) | 38 (86.4%) | 21 (87.5%) | 38 (84.4%) | 10 (62.5%) | 103 |
Had ≥3 valid GPS days | 52 (92.9%) | 40 (81.6%) | 35 (79.5%) | 18 (75.0%) | 33 (73.3%) | 8 (50.0%) | 93 |
Had a car for transportation | 54 (96.4%) | 46 (93.9%) | 40 (90.9%) | 21 (87.5%) | 40 (88.9%) | 13 (81.3%) | 107 |
Going to work by automobile | 51 (91.1%) | 44 (89.8%) | 39 (88.6%) | 22 (91.7%) | 41 (91.1%) | 13 (81.3%) | 105 |
Going to work by bus, metro rail, or train | 7 (12.5%) | 7 (14.3%) | 3 (6.8%) | 3 (12.5%) | 3 (6.7%) | 3 (18.8%) | 13 |
Going to work by walking | 7 (12.5%) | 6 (12.2%) | 5 (11.4%) | 3 (12.5%) | 5 (11.1%) | 2 (12.5%) | 14 |