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Table 5 ANOVA analysis of total daily in-vehicle travel time based on GPS data a by subject characteristics

From: Travel patterns during pregnancy: comparison between Global Positioning System (GPS) tracking and questionnaire data

   <20 weeks 20-30 weeks >30 weeks
Variable Values N Travel time (min/day) p-value N Travel time (min/day) p-value N Travel time (min/day) p-value
All subjects   42 73   36 66   19 64  
Age <30 21 63 0.09 16 58 0.14 10 61 0.64
≥30 21 84   20 73   9 68  
Education level High school 18 69 0.00 13 54 0.06 11 62 0.58
University and above 18 87   20 76   7 71  
Otherb 6 44   3 54   1 47  
Number of other children 0 20 87 0.03 21 72 0.28 12 72 0.21
≥1 22 61   15 59   7 52  
Number of persons ≤2 22 83 0.08 22 71 0.36 13 70 0.34
>2 20 63   14 60   6 53  
Annual household income ≤$50,000 22 65 0.10 18 56 0.02 11 58 0.30
>$50,000 19 85   17 80   8 73  
Unknown 1 38   1 15     
Marital status Yes 25 79 0.24 22 68 0.79 11 68 0.55
No 17 65   14 64   8 59  
Ethnicity Asian 4 79 0.69 6 70 0.52 3 51 0.21
Hispanic 18 68   16 62   8 66  
White 15 82   11 66   5 61  
  Other 5 64   3 82   3 80  
  1. aAveraged for each person-week with at least two valid GPS days (valid GPS day: ≥50% of GPS data between 7:00 AM and 10:59 PM).
  2. bTechnical school, or trade school, or lower than high school.