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Table 2 The weights given to the candidate variables in a new parsimonious index

From: Potential effect modifiers for treatment with chiropractic manipulation versus sham manipulation for recurrent headaches in children aged 7–14 years: development of and results from a secondary analysis of a randomised clinical trial

Candidate variable

Weight

Effect

Frequency of headache

0.17

0.26

Length of episode

0.02

0.03

Sport activity

0.13

0.25

Sleep duration

− 0.13

− 0.40

Trauma experience

0.05

0.03

History of neck pain

0.21

0.43

Headache in the family

0.19

0.33

  1. “Weight” refers to the regression coefficients when using the standardized variables as input. “Effect” refers to the regression coefficients when using the unstandardized variables as input
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Chiropractic & Manual Therapies

ISSN: 2045-709X