. 2017 Jan 11;7:40477. doi: 10.1038/srep40477

Table 1. Summary of the linear least squares fits that describe the axial and radial force increase with insertion depth in silicone.

Tip	Slope F_a [N/mm]	R²	Slope F_r [N/mm]	R²
B10	1.8	0.79	4.1	0.91
B20	2.8	0.92	9.5	0.95
B30	4.0	0.98	15.1	0.94
C10	1.0	0.84	2.6	0.98
C20	2.1	0.94	7.6	0.92
C30	3.3	0.97	11.6	0.97

Presented are the slopes and the coefficients of determination (R²).