In multivariable Cox analysis , adjusting for age , sex , hemoglobin , diabetes , time-varying SBP , heart rate , study treatment and Sokolow-Lyon hypertrophy , psoriasis , treated as a time-varying covariate , was associated with a two-fold higher risk of new-onset atrial fibrillation [ hazard ratio : 1.97 ( 95 % confidence interval ( CI ) : 1.18-3 .30 ) , P = 0.01 ] .