Predicting trends in fatal drug overdoses in Ireland: does day of the week matter?
Simone Walsh, Ena Lynn and Suzi Lyons
NDRDI Background
• National Drug-Related Deaths Index (NDRDI) established in 2005
• Funded by Dept. of Health and Dept. of Justice and Equality
• European Monitoring Centre for Drugs and Drug Addiction (EMCDDA)
Overview
• 2,734 individuals died between 1998 and 2009 of a fatal drug overdose (poisoning) in Ireland
• Age and Gender• Significant Events (Christmas, St Patricks Day)• Substance involved and route of
administration• Who deceased was with and where they were
at the time of death
All NDRDI Poisoning Deaths 1998 to 2009
5
All NDRDI poisoning deaths 1998 to 2009, by day of the week, n=2734
Monday Tuesday Wednesday Thursday Friday Saturday Sunday0
50
100
150
200
250
300
350
400
450
500
Day Of The Week
Num
ber
6
All NDRDI poisoning deaths 1998 to 2009, gender by day of the week, n=2734
Monday Tuesday Wednesday Thursday Friday Saturday Sunday.0%
2.0%
4.0%
6.0%
8.0%
10.0%
12.0%
14.0%
16.0%
18.0%
MaleFemale
Day Of The Week
Per
cent
age
7
All NDRDI poisoning deaths 1998 to 2009, median age by day of the week, n=2734
Day of the Week Median AgeMonday 35
Tuesday 35
Wednesday 36
Thursday 35
Friday 35
Saturday 34
Sunday 33
All NDRDI poisoning deaths 1998 to 2009, median age by day of the week, n=2734
8
Day of the Week Median AgeMonday 35
Tuesday 35
Wednesday 36
Thursday 35
Friday 35
Saturday 34
Sunday 33
All NDRDI poisoning deaths 1998 to 2009, median age by day of the week, n=2734
9
Day of the Week Median AgeMonday 35
Tuesday 35
Wednesday 36
Thursday 35
Friday 35
Saturday 34
Sunday 33
All Cocaine Poisonings NDRDI 1998 to 2009
All cocaine poisoning deaths 1998 to 2009, by day of the week, n=318
Monday Tuesday Wednesday Thursday Friday Saturday Sunday0
10
20
30
40
50
60
70
Day Of The Week
Num
ber
11
Cocaine Poisonings Excluding Opiates NDRDI, 1998 to 2009
Cocaine poisonings excluding opiates 1998 to 2009,by day of the week n=146
Monday Tuesday Wednesday Thursday Friday Saturday Sunday0
5
10
15
20
25
30
35
Day Of The Week
Nim
ber
13
Cocaine poisonings excluding opiates 1998 to 2009, gender by day of the week n=146
14
Monday Tuesday Wednesday Thursday Friday Saturday Sunday.0%
5.0%
10.0%
15.0%
20.0%
25.0%
30.0%
35.0%
Male Female
Day Of The Week
Perc
enta
ge
Cocaine poisonings excluding opiates 1998 to 2009,who with by day of the week n=146
15
Monday Tuesday Wednesday Thursday Friday Saturday Sunday.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
AloneWith Someone
Day Of The Week
Perc
enta
ge
Heroin Poisonings NDRDI 1998 to 2009
17
Heroin poisoning deaths 1998 to 2009, by day of the week, NDRDI n=643
Monday Tuesday Wednesday Thursday Friday Saturday Sunday0
20
40
60
80
100
120
Day Of The Week
Num
ber
Non-injecting Heroin Poisoning Deaths NDRDI,1998 to 2009
19
Non-injecting heroin poisoning deaths 1998 to 2009, by day of the week, n=234
Monday Tuesday Wednesday Thursday Friday Saturday Sunday0
5
10
15
20
25
30
35
40
45
50
Day Of The Week
Num
ber
20
Non-injecting heroin poisoning deaths 1998 to 2009, gender by day of the week, n=234
Monday Tuesday Wednesday Thursday Friday Saturday Sunday.0%
5.0%
10.0%
15.0%
20.0%
25.0%
30.0%
MaleFemale
Day Of The Week
Perc
enta
ge
21
Non-injecting heroin poisoning deaths 1998 to 2009, median age by day of the week, n=234
Day of The Week Median AgeMonday 31Tuesday 28
Wednesday 30Thursday 29
Friday 28Saturday 27Sunday 29
Non-injecting heroin poisoning deaths 1998 to 2009, median age by day of the week, n=234
22
Day of The Week Median AgeMonday 31Tuesday 28
Wednesday 30Thursday 29
Friday 28Saturday 27Sunday 29
Non-injecting heroin poisoning deaths 1998 to 2009, median age by day of the week, n=234
23
Day of The Week Median AgeMonday 31Tuesday 28
Wednesday 30Thursday 29
Friday 28Saturday 27Sunday 29
24
Non-injecting heroin poisoning deaths 1998 to 2009, who with at time of death, n=234
Monday Tuesday Wednesday Thursday Friday Saturday Sunday.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
AloneWithsomeone
Day of the Week
Perc
enta
ge
Injecting Heroin Poisoning Deaths NDRDI 1998 to 2009
26
Injecting heroin poisoning deaths 1998 to 2009, by day of the week, n=405
Monday Tuesday Wednesday Thursday Friday Saturday Sunday0
10
20
30
40
50
60
70
80
Day Of The Week
Num
ber
27
Injecting heroin poisoning deaths 1998 to 2009, by gender and day of the week, n=405
Monday Tuesday Wednesday Thursday Friday Saturday Sunday.0%
5.0%
10.0%
15.0%
20.0%
25.0%
30.0%
35.0%
Male Female
Day Of The Week
Perc
enta
ge
28
Injecting heroin poisoning deaths 1998 to 2009,median age by day of the week, n=405
Day of the Week Median AgeMonday 31
Tuesday 32
Wednesday 33
Thursday 31
Friday 31
Saturday 27
Sunday 25
29
Injecting heroin poisoning deaths 1998 to 2009,median age by day of the week, n=405
Day of the Week Median AgeMonday 31
Tuesday 32
Wednesday 33
Thursday 31
Friday 31
Saturday 27
Sunday 25
30
Injecting heroin poisoning deaths 1998 to 2009,median age by day of the week, n=405
Day of the Week Median AgeMonday 31
Tuesday 32
Wednesday 33
Thursday 31
Friday 31
Saturday 27
Sunday 25
31
Injecting heroin poisoning deaths 1998 to 2009, who with at time of death, n=405
Monday Tuesday Wednesday Thursday Friday Saturday Sunday.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
AloneWith Someone
Day Of The Week
Perc
enta
ge
Injecting heroin poisoning deaths 1998 to 2009, who with at time of death, n=405
Monday Tuesday Wednesday Thursday Friday Saturday Sunday.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
AloneWith Someone
Day Of The Week
Perc
enta
ge
32
All NDRDI Deaths by Week of the Month NDRDI, 1998 to 2009
34
All NDRDI deaths by week of the month,1998 to 2009, n = 2,734
Monday Tuesday Wednesday Thursday Friday Saturday Sunday.0%
5.0%
10.0%
15.0%
20.0%
25.0%
30.0%
35.0%
FirstSecondThirdFourth
Grouped day of the week
Perc
enta
ge
35
All female NDRDI poisoning deaths Tuesday and Wednesday n=220
First Second Third Fourth.0%
5.0%
10.0%
15.0%
20.0%
25.0%
30.0%
35.0%
40.0%
TuesdayWednesday
Grouped day of the week
Perc
enta
ge
All female NDRDI poisoning deaths Tuesday and Wednesday n=220
36
First Second Third Fourth.0%
5.0%
10.0%
15.0%
20.0%
25.0%
30.0%
35.0%
40.0%
TuesdayWednesday
Grouped day of the week
Perc
enta
ge
Findings
• Delivering harm reduction messages and treatment outcomes - day of the week does matter
• Subgroups within the drug using population are at risk different times of the week or month
• Opportunity to save a life
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