Interval censoring in longitudinal data of respiratory symptoms in aluminium potroom workers: a comparison of methods.

Abstract:

:In a longitudinal study of workers in seven Norwegian aluminium plants, the time to development of asthmatic symptoms could only be determined to lie in the interval between two consecutive health examinations. In a previous paper we analysed the data by survival techniques for interval censored data. In the present paper the data are reanalysed in two ways and compared to the previous analyses. First, it is assumed that occurrence of symptoms coincided with reporting, in which case the data can be analysed as right censored. Secondly, the follow-up times are completely disregarded and the effects of covariates are analysed on the binary outcomes of symptoms. Comparing the estimated effects of the covariates between the three approaches, only minor differences were found. However, the estimates on incidence were strongly influenced by whether the data were analysed as right or interval censored.

journal_name

Stat Med

journal_title

Statistics in medicine

authors

Samuelsen SO,Kongerud J

doi

10.1002/sim.4780131708

subject

Has Abstract

pub_date

1994-09-15 00:00:00

pages

1771-80

issue

17

eissn

0277-6715

issn

1097-0258

journal_volume

13

pub_type

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