High Ambient Temperatures and Risk of Motor Vehicle Crashes in Catalonia, Spain (2000–2011): A Time-Series Analysis

http://dx.doi.org/10.1289/ehp.1409223



Table 1. Descriptive statistics on the daily number of motor vehicle crashes occurring between 15 May and 15 October of each year from 2000–2011.
Variable All crashes Crashes with driver performance-
associated factorsa
Total number Daily average ± SD Total number (%) Daily average ± SD
aCrashes that included among the list of concurrent factors at least one of the following: “distraction,” “driver error,” or “disease, fatigue, or sleepiness.” bPrevious day, first day, or last day of a holiday period.
Year
2000 9,956 64.6 ± 12.3 3,030 (30.4) 19.7 ± 7.5
2001 9,662 62.7 ± 12.7 1,948 (20.2) 12.6 ± 4.2
2002 9,285 60.3 ± 12.4 1,462 (15.7) 9.5 ± 3.1
2003 8,802 57.2 ± 12.2 2,692 (30.6) 17.5 ± 5.1
2004 8,552 55.5 ± 11.8 2,548 (29.8) 16.5 ± 4.8
2005 9,187 59.7 ± 13.1 2,088 (22.7) 13.6 ± 4.1
2006 10,409 67.6 ± 14.4 3,553 (34.1) 23.1 ± 6.0
2007 11,201 72.7 ± 14.8 4,134 (36.9) 26.8 ± 6.3
2008 10,470 68.0 ± 14.6 4,126 (39.4) 26.8 ± 6.4
2009 10,685 69.4 ± 14.7 4,230 (39.6) 27.5 ± 6.5
2010 10,388 67.5 ± 13.5 4,196 (40.4) 27.2 ± 6.1
2011 9,892 64.2 ± 14.1 3,958 (40.0) 25.7 ± 7.0
Month
May (15th to 31st) 13,864 68.0 ± 12.4 4,422 (31.9) 20.0 ± 10.1
June 25,174 69.9 ± 13.9 8,045 (32.0) 20.6 ± 10.1
July 26,092 70.1 ± 13.1 8,284 (31.7) 20.6 ± 9.9
August 20,047 53.9 ± 11.8 6,716 (33.5) 16.7 ± 8.7
September 21,954 61.0 ± 12.5 6,920 (31.5) 17.7 ± 9.4
October (1st to 15th) 11,358 63.1 ± 13.7 3,578 (31.5) 18.3 ± 10.2
Day of Week
Sunday 13,664 51.8 ± 10.1 4,589 (33.6) 16.0 ± 7.9
Monday 17,279 65.5 ± 12.9 5,537 (32.0) 19.4 ± 9.9
Tuesday 17,337 65.7 ± 13.4 5,521 (31.8) 19.3 ± 10.3
Wednesday 17,394 65.9 ± 13.1 5,441 (31.3) 19.0 ± 9.7
Thursday 17,954 68.0 ± 13.6 5,706 (31.8) 20.0 ± 10.3
Friday 19,147 72.5 ± 15.3 5,904 (30.8) 20.6 ± 10.4
Saturday 15,714 59.5 ± 11.3 5,267 (33.5) 18.4 ± 9.2
Holiday
No 115,042 64.7 ± 14.0 36,822 (32.0) 19.1 ± 9.8
Yes 3,447 48.5 ± 12.9 1,143 (33.2) 14.8 ± 8.6
Beginning or end of holidaysb
No 112,468 64.5 ± 14.1 35,995 (32.0) 19.0 ± 9.9
Yes 6,021 57.3 ± 15.2 1,970 (32.7) 17.9 ± 8.5