Table 5.

Estimates from a multiple linear regression model for age, adjusting for patient race, sex, tumour location and grade, among patients with stage I and II disease only

	Stages I and II only
Adjusted mean age (years), stage I	60.03 (58.71 to 61.35)
Age difference (years): stage IIA, ≤2 cm vs stage I	1.48 (0.17 to 2.79), p=0.03
Age difference (years): stage IIA, >2 cm vs stage I	1.79 (0.96 to 2.63), p<0.0001
Age difference (years): stage IIB, T1 and T2 vs stage I	−0.41 (−1.39 to 0.58), p=0.42
Age difference (years): stage IIB, T3, ≤2 cm vs stage I	−0.41 (−1.52 to 0.7), p=0.47
Age difference (years): stage IIB, T3, >2 cm vs stage I	0.43 (−0.31 to 1.17), p=0.26
Adjusted mean age (years), stage IIA, ≤2 cm	61.51 (59.82 to 63.21)
Age difference (years): stage IIA, >2 cm vs stage IIA, ≤2 cm	0.31 (−0.95 to 1.57), p=0.63
Age difference (years): stage IIB, T1 and T2 vs stage IIA, ≤2 cm	−1.89 (−3.26 to −0.52), p=0.007
Age difference (years): stage IIB, T3, ≤2 cm vs stage IIA, ≤2 cm	−1.89 (−3.34 to −0.44), p=0.01
Age difference (years): stage IIB, T3, >2 cm vs stage IIA, ≤2 cm	−1.06 (−2.25 to 0.14), p=0.08
Adjusted mean age (years), stage IIA, >2 cm	61.82 (60.44 to 63.21)
Age difference (years): stage IIB, T1 and T2 vs stage IIA, >2 cm	−2.2 (−3.12 to −1.28), p<0.0001
Age difference (years): stage IIB, T3, <2 cm vs stage IIA, >2 cm	−2.2 (−3.25 to −1.15), p<0.0001
Age difference (years): stage IIB, T3, >2 cm vs stage IIA, >2 cm	−1.37 (−2.01 to −0.73), p<0.0001
Adjusted mean age (years), stage IIB, T1 and T2	59.62 (58.16 to 61.08)
Age difference (years): stage IIB, T3, ≤2 cm vs stage IIB, T1 and T2	0 (−1.17 to 1.17), p=1
Age difference (years): stage IIB, T3, >2 cm vs stage IIB, T1 and T2	0.83 (0.01 to 1.66), p=0.05
Adjusted mean age (years), stage IIB, T3, ≤2 cm	59.62 (58.04 to 61.2)
Age difference (years): stage IIB, T3, >2 cm vs stage IIB, T3, ≤2 cm	0.84 (−0.12 to 1.8), p=0.09
Adjusted mean age (years), stage IIB, T3, >2 cm	60.46 (59.11 to 61.8)

Values given are mean differences in ages by tumour size, with 95% CIs.