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Table 3 Factors associated with risk of attrition among the online participants in the initial phase

From: Factors associated with attrition in a longitudinal online study: results from the HaBIDS panel

 

Model A:

discontinuation as event of interest,

withdrawal as competing event

Model B:

withdrawal as event of interest,

discontinuation as competing event

 

Beta

Hazard ratio

Beta

Hazard ratio

Age at baseline (per 10 years increase)

−0.15

0.86

0.10

1.11

Frequency of Internet usage

not selected in this model

  

Daily

Reference

Reference

Less than daily

0.28

1.32

PSS score (per 1 point increase)

0.04

1.04

not selected in this model

Time between invitation and return

of the filled informed consent form (per week)

0.05

1.05

not selected in this model

Had to be reminded to fill in

the first online questionnaire (A)

  

not selected in this model

 Yes

0.37

1.44

 No

Reference

 
  1. Variables were selected using the least absolute shrinkage and selection operator method in competing risks regression
  2. PSS: perceived stress scale (score ranges from 0 [very low stress level] to 16 [very high stress level])