The reliability and predictive validity of the Heaviness of Smoking Index and its two components: Findings from the International Tobacco Control Four Country study

Borland, R.; Yong, Hua‐Hie; J. O’Connor, Richard; Hyland, Andrew; E. Thompson, Mary

doi:10.1093/ntr/ntq038

Public

The reliability and predictive validity of the Heaviness of Smoking Index and its two components: Findings from the International Tobacco Control Four Country study

Published in Nicotine & Tobacco Research • Sep 30, 2010

Authors:

R. Borland

Hua‐Hie Yong

Richard J. O’Connor

Abstract

BACKGROUND: There is increasing recognition that the two measures in the Heaviness of Smoking Index (HSI), time to first cigarette of the day (TTFC) and daily consumption (cigarettes per day [CPD]), are strong predictors of quitting behavior. METHODS: Use of Waves 1-4 of International Tobacco Contro...

Subject

Categorical variable

Medicine

Reliability (semiconductor)

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