Post on 03-Jan-2016
transcript
Work (14 hours, incl commuting)
Sleep (8 hours)
Life: exercise, eating recreation, chores, family, community
(2 hours!!!?)
Problem / Questions
What health and fitness problems
are log truck drivers facing?
How significant are these problems?
What can we do about it?
Study design
Initial meetings with operators and day with driver to scope issues and task demands
Questionnaire (225 drivers, 16% of pop)
Anonymous information from operators used to validate some variables (weight, hearing etc)
‘In cab’ half-day driver interviews (15 drivers)
Industry focus group for recommendations
Key Findings
Obesity: Nutrition/exercise
Workplace injuries
Work/life balance (incl working hours and fatigue)
Drowsy drivers
0
5
10
15
20
25
30
35
40
45
50
4 5 6 7 8 9 or more
Hours of sleep per night
% o
f d
rive
rs
drowsy nowand then
drowsy atleast "fairlyregularly"
• 25% of drivers report getting 4-5 hours sleep per night
• 15% of drivers report feeling drowsy while truck driving on a frequent basis
0
5
10
15
20
25
30
35
40
45
50
55
Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Day of Week
No
. of
Cra
shes
Loss of control log truck ‘roll-overs’ 2001-2009
Purpose:
Describe the sleep patterns of log truck drivers Determine whether sleep patterns are likely to be contributors to early working week crash risk.
Considerations and purpose
Study method
Two main stages of data collection:
1)Validation of a sleep diary using activity monitors (12 drivers, both sleep diary and activity monitor for 1 week)
2) A survey of drivers (45 drivers, 7-day sleep diary only plus questions)
0
500
1000
1500
2000
2500
3000
7:22
:00
8:01
:00
8:40
:00
9:19
:00
9:58
:00
10:3
7:00
11:1
6:00
11:5
5:00
12:3
4:00
13:1
3:00
13:5
2:00
14:3
1:00
15:1
0:00
15:4
9:00
16:2
8:00
17:0
7:00
17:4
6:00
18:2
5:00
19:0
4:00
19:4
3:00
20:2
2:00
21:0
1:00
21:4
0:00
22:1
9:00
22:5
8:00
23:3
7:00
0:16
:00
0:55
:00
1:34
:00
2:13
:00
2:52
:00
3:31
:00
4:10
:00
4:49
:00
5:28
:00
6:07
:00
6:46
:00
Activ
ity co
unts
Time
Findings
Night Time to bed
(average)
Time asleep (average)
Time wake (average)
Total Sleep duration (average)
Rating of sleep
(average)*
Monday 8:15 PM 8:40 PM 3:02 AM 6hrs 17min 3.4
Tuesday 8:15 PM 8:37 PM 2:54 AM 6hrs 17min 3.6
Wednesday 8:20 PM 8:39 PM 2:49 AM 6hrs 16min 3.5
Thursday 8:45 PM 9:00 PM 3:28 AM 6hrs 31min 3.7
Friday 9:45 PM 10:15 PM 6:40 AM 8hrs 39min 4.1
Saturday 9:02 PM 9:33 PM 6:17 AM 7hrs 48min 3.7
Sunday 8:08 PM 8:37 PM 2:55 AM 6hrs 29min 3.5
* 1 = very bad, 5 = great
Summary of Sleep diary results for each night of the week
Findings
Summary of Sleep diary results for week nights
0102030405060708090
Num
ber o
f wee
kday
dr
iver
nig
hts
Hours sleep (per night)
Generally recommended hours sleep per night
Questionnaire results
Times of the week (Monday am, Monday pm, Tuesday am etc) drivers felt they were at most risk of tiredness, fatigue or loss of attention
40
45
50
55
60
65
70
75
Mon am
Mon pm
Tues am
Tues pm
Wed am
Wed pm
Thurs am
Thurs pm
Fri am Fri pm
tire
dnes
s ri
sk
Questionnaire results
Comments from those who ranked Mondays or Tuesdays as times of high risk for tiredness, fatigue or loss of attention :
Catches up with me after
weekend off
Monday morning getting back to normal and fresh start to week.
Hard to adjust after
weekend Mon morning
Questionnaire resultsWhat could be done to make tiredness or fatigue less of a problem for log truck drivers?:
Solution mentioned CountLess hours 12Regular start times 7higher wages 7later start 4Eat well / stay healthy (+ provision) 4Take breaks 4More sleep 4Improve scheduling 2Awareness/encouragement 1Log book pressure 1Stimulants 1Education public 1Manage weekend 1Places to pull over and socialise 1longer breaks 1Better roads 1
Conclusions
Not enough sleep
Work during risky hours
Weekend/weekday transition problems?
Current working hours related to many driver issues
Work (14 hours, incl commuting)
Sleep (8 hours)
Life: exercise, eating recreation, chores, family, community
(2 hours!!!?)