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Table 2 Principal component analysis of the LWDS-11 items among waterpipe smokers only (N = 449)

From: Lebanese Waterpipe Dependence Scale (LWDS-11) validation in a sample of Lebanese adolescents

LWDS-11 item

Factor 1

h2

communalities

Item-total correlation*

LWDS 1. Number of times you could stop waterpipe for 7 days?

0.881

0.776

0.884

LWDS 2. Percent of income you would spend on waterpipe smoking?

0.667

0.445

0.665

LWDS 3. Number of days you could spend without waterpipe?

0.806

0.649

0.815

LWDS 4. Number of water pipes you usually smoke per week?

0.622

0.387

0.627

LWDS 5. You smoke waterpipe to relax your nerves.

0.848

0.719

0.853

LWDS 6. You smoke waterpipe to improve your morale.

0.843

0.710

0.847

LWDS 7. Do you smoke waterpipe when you are seriously ill?

0.917

0.841

0.909

LWDS 8. Do you smoke waterpipe alone?

0.888

0.789

0.882

LWDS 9. Are you ready not to eat in exchange for a waterpipe?

0.898

0.806

0.890

LWDS 10. You smoke waterpipe for pleasure.

0.884

0.782

0.885

LWDS 11. You smoke to please others (for conviviality)

0.919

0.845

0.911

Percentage of variance explained

70.45

  

Cronbach’s alpha

0.96

  
  1. *p < 0.001 for all correlations