Model for Developing a Health-Related Quality of Life Questionnaire for Chronic Obstructive Pulmonary Disease

Table 4

Multifactorial nonlinear regression analysis values for model development.

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Number of observations = 132

Nonlinear iteration limit = 250

Diverging nonlinear iteration limit = 10

Number of nonlinear iterations performed = 5

Residual tolerance = 0.0000000001

Sum of residuals = 2.4163

Average residual = 1.8305

Residual sum of squares (absolute) = 3806.8881

Residual sum of squares (relative) = 3806.8881

Standard error of the estimate = 5.4966

Coefficient of multiple determination (R²) = 0.6362

Proportion of variance explained = 63.6259%

Adjusted coefficient of multiple determination (R_a²) = 0.6218251316

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