The regimens were balanced with regard to these and all other major pretreatment variables.
The major pretreatment methods include physical, chemical, and biological approaches.
The effects of several major pretreatment parameters including NaOH concentration, temperature, and reaction time on sugar yields and enzymatic digestibility were investigated, and the pretreatment conditions were optimized.
Pretreatment variables are respondents' work situation, income earned through labor (or pensions), size of place of residence, and household size.
Descriptive statistics of the pretreatment variables for both extraction and non-extraction groups are listed in Table 1.
Recently, 2 point-based nomograms have been developed based on pretreatment variables measured on a routine basis.
To assess the independent value of different pretreatment variables on survival, in the presence of other variables, multivariate analysis was performed using the Cox proportional hazards model.
To assess the independent value of different pretreatment variables on survival, in the presence of other variables, multivariate analyses were carried out using the Cox proportional hazards model.
On multivariate analysis, pretreatment serum EPCA level held the most significantly predictive value for the biochemical recurrence and androgen-independent progression among pretreatment variables (HR = 4.860, P<0.001 and HR = 5.418, P<0.001, respectively).
In instances when the groups differed on pretreatment variables, these variables would be included as covariates.
