Table 1.

Multivariable models with general shape: Pain after compression = Σ Effect × Predictor value

	Model 1 (n = 281)		Model 2 (n = 324)
Predictor	Effect	Significance	Effect	Significance
Recollected pain score [NRS]	0.763	p < .001	excluded
Baseline pain score [NRS]	0.108	p = .06	0.263	p < .002
Maximum reached force [daN]			−0.204	p < .005
Duration of clamp phase [sec]	−0.046	p = .10	−0.075	p < .05

Model selection was performed by stepwise minimization of the Akaike Information Criterion. Model 1 includes the recollected pain scores of the previous mammogram (available for n = 281 cases). In model 2 (all cases: n = 324), the recollected pain scores were excluded.