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Table 2 Negative Binomial Regression Model for association between amphetamine reported quantities rate amphetamine use disorder admission rate

From: Does illicit amphetamine seizures quantity associated with amphetamine use disorder related admissions in Saudi Arabia?

 

Amphetamine use disorder admission incident rate ratio

Estimate

IRR2

Standard Error

95% Confidence Intervals

P value1

Annual amphetamine reported sized quantities

2005

0.32

0.84

(−2.65, 0.65)

0.23

2006

0.85

0.87

(0.09, 2.51)

0.03

2007

0.67

0.61

(−0.41, 1.65)

0.23

2008

0.78

0.52

(− 0.242, 2.1)

0.12

2009

1.16

0.59

(0.02, 1.99)

0.03

2010

1.12

0.51

(0.021, 2.51)

0.04

2011

0.9

0.63

(0.022, 2.12)

0.05

2012

1.51

0.54

(0.073, 2.62)

0.03

2013

1.6

0.65

(0.042, 2.62)

0.05

2014

0.48

0.61

(−0.71, 0.94)

0.78

2015

1.31

0.42

(0.31, 2.47)

0.01

2016

0.83

0.55

(−0.35, 1.11)

0.31

2017

0.77

0.37

(−0.32, 1.31)

0.12

2018

1.29

0.41

(0.078, 0.26)

0.002

  1. 1Negative Binomial regression model
  2. 2Incident rate ratio