For survival analyses, data from the respective follow-up periods was analyzed individually followed by pooled analysis for the surveys without treatment (i.e. surveys 1, 3 and 4).
The information on confounders was updated to the respective follow-up time point.
This was performed by subtracting each parameter at the respective follow-up examination from the preprocedure value.
The coefficients shown are the results of the joint effects of migraine status and the respective follow-up time.
Because of the later study entry, the respective follow-up times for participants of MONICA II and III are shorter.
Regarding DFS, out of 69 NPC patients for whom follow-up information was available, 28 patients (40.6%) relapsed during the respective follow-up periods.
The effect sizes at respective follow-up periods were 0.55 at 6-months, 0.81 at 12-months and 0.56 at 24-months.
With regard to OS, out of 69 NPC patients for whom follow-up data were available, 27 patients (39.1%) died during the respective follow-up periods.
In patients who were alive and remained in hospital until the respective follow-up day, all biomarker values on Days 3, 5, and 7 of follow-up were available in 91.1%, 87.6% and 86.1% of patients, respectively.
