On the basis of distribution of responses categorical variables were recoded into binary variables for multivariable analyses.
For multivariable analyses, three models were developed to examine the association between insomnia and TTH.
For multivariable analyses, body site and penetration depth remained a fixed variable for all analyses.
Participants with GG and GC genotypes were combined for multivariable analyses because they had similar cardiac function in unadjusted analyses.
Only results for multivariable analyses are presented.
Cox proportional hazards were used for multivariable analyses.
Ordered logistic regression models were used for multivariable analyses.
Cox (1972) model was applied for multivariable analyses.
For multivariable analyses, a linear regression analysis was performed.
Chi-Square tests were used for univariable analyses and linear- and logistic models for multivariable analyses.
For both studies, age was categorized in 5-year age-groups for multivariable analyses.
