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Table 3 Factors associated with repeated poisoning—Cox regression analysis

From: Follow-up of young patients after acute poisoning by substances of abuse: a comparative cohort study at an emergency outpatient clinic

   

Crude

Adjusted

n

Events

Hazard ratio

95 % CI

p

Hazard ratio

95 % CI

p

Age

16–22 yearsa

788

58

      

23–27 years

535

65

1.7

1.2–2.4

0.004

1.1

0.78–1.6

0.525

Sex

Femalesa

604

45

      

Males

719

78

1.5

1.0–2.2

0.033

1.1

0.77–1.6

0.553

Main toxic agent

Ethanola

823

30

      

Opioids

215

59

9.3

6.0–14.4

<0.001

8.9

5.6–14.1

<0.001

Benzodiazepines

108

16

4.7

2.5–8.6

<0.001

4.8

2.5–8.9

<0.001

Central stimulants

62

6

2.8

1.2–6.7

0.022

2.6

1.1–6.4

0.032

GHB

70

9

3.6

1.7–7.7

0.001

3.7

1.7–8.3

0.001

Other

45

3

1.9

0.58–6.2

0.288

1.8

0.56–6.1

0.316

Outcome

Not hospitaliseda

1150

100

      

Hospitalised

173

23

1.6

1.0–2.5

0.050

0.91

0.56–1.5

0.706

  1. Factors associated with repetition of poisoning in 1323 patients aged 16–27 years presenting with acute poisoning by substances of abuse in 2003, 2008 and 2012. There were 123 events (repetitions). One patient was censored due to death, two were censored due to emigration
  2. aReference group