| General linear regression | Mixed effect model (fixed effects) | ||||||
---|---|---|---|---|---|---|---|---|
 | Beta | Standard error | p-value | Partial R2 | VIF | Beta | Standard error | p-value |
Home to work trips (93 tripsa from 31 subjects) | (Model R2 = 0.33; cross validation R2 = 0.29) |  | ||||||
Intercept | -17.62 | 5.11 | 0.0009 | Â | 0 | -17.16 | 8.13 | 0.0439 |
Self-reported distance for home to work trips | -0.27 | 0.08 | 0.0011 | 0.09 | 1.53 | -0.28 | 0.12 | 0.0196 |
Vehicle make (Japanese car: 1; other: 0) | 7.81 | 2.24 | 0.0008 | 0.09 | 1.07 | 7.24 | 3.44 | 0.0397 |
Rush hour (yes/no) | -7.42 | 2.52 | 0.0041 | 0.07 | 1.07 | -5.97 | 2.29 | 0.0114 |
More than two persons in the household (yes/no) | 6.52 | 2.29 | 0.0055 | 0.04 | 1.06 | 5.72 | 3.48 | 0.1054 |
Percentage of travel time on freeways | 16.12 | 4.43 | 0.0005 | 0.04 | 1.56 | 19.49 | 5.78 | 0.0013 |
Work to home trips (89 trips from 31 subjects) | (Model R2 = 0.36; cross validation R2 = 0.31) |  | ||||||
Intercept | 0.71 | 4.50 | 0.8752 | Â | 0 | 0.45 | 4.91 | 0.9272 |
Self-reported duration for work to home trips | 0.48 | 0.07 | <.0001 | 0.32 | 1.00 | 0.46 | 0.10 | <.0001 |
Weekday (yes/no) | -10.80 | 4.43 | 0.0165 | 0.04 | 1.00 | -10.57 | 3.99 | 0.0105 |