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Table 2 Key study variables as a function of past 6-month injury [yes/no]

From: High peak drinking levels mediate the relation between impulsive personality and injury risk in emerging adults

Variables

Injury

 

p

 

Yes [n = 170]

No [n = 1148]

Mean differencea (mean ± SEM)

t

 

Cohen’s d

Age

19.28 (0.01)

19.26 (0.04)

0.17

0.861

0.014

Peak drinking quantity [past 30 days]

7.52 (0.44)

6.38 (0.16)

2.6

0.009**

0.261

Impulsivity

11.40 (0.22)

10.91 (0.08)

2.22

0.026*

0.185

Risky behaviour

16.44 (0.51)

15.09 (0.18)

2.63

0.008**

0.217

Associationb

  

χ2

p

 

Sex

[N (%)] *

    

 Male

38 (2.90)

229 (17.50)

0.49

0.498

–

 Female

132 (10.10)

910 (69.50)

  

–

Correlationc

(1)

(2)

(3)

–

–

Impulsivity (1)

–

  

–

–

Peak drinking quantity (2)

0.189**

–

 

–

–

Risky behaviour (3)

0.241**

0.440**

–

–

–

  1. aIndependent sample t-test
  2. bChi-square (χ2) test
  3. cPearson correlation (r) test [controlling for ‘Age’, ‘Sex’, and ‘Study site’]
  4. Significant at *p < 0.05; **p < 0.01