Table 2.

Staging of breast cancer at diagnosis

Age group	Randomised group	Stages I or II (No (%))	Stages III or IV (No (%))	Total No	Pearson x 2	Difference (%) in stages III+IV between screening and control arms (95% CI)
All women*	Screening arm	379 (63)	220 (37)	599	11.757 (P=0.001)	9.83 (4.208 to 15.368)
	Control arm	311 (53)	271 (47)	582
<50†	Screening arm	271 (63)	161 (37)	432	8.034 (P=0.005)	9.77 (3.008 to 16.423)
	Control arm	206 (53)	183 (47)	389
≥50‡	Screening arm	108 (65)	59 (35)	167	3.906 (P=0.05)	10.27 (0.094 to 20.092)
	Control arm	105 (54)	88 (46)	193

^*Staging information unavailable from 41 women in the screening arm and 73 women in the control arm.

^†Staging information unavailable from six women in the screening arm and 12 women in the control arm.

^‡Staging information unavailable from 35 women in the screening arm and 61 women in the control arm.