Table 1A. Repeat screening uptake per biennial invitation round by previous screening episode factors in percentages with the denominator (n).

	R2	R3
Total repeat screening uptake	86.55 (34 856)	88.55 (38 373)
By previous screening episode factors
Time to kit return
⩽28 Days	88.64 (23 361)	90.48 (26 136)
>28 Days	82.30 (11 495)	84.45 (12 237)
Weak positives
None	86.81 (33 930)	88.82 (36 941)
One or more	76.89 (926)	81.70 (1432)
Definitive gFOBt result
Normal	86.75 (34 576)	88.84 (37 907)
Abnormal	61.43 (280)	65.67 (466)
Spoilt kit
None	86.59 (34 651)	88.62 (38 067)
One or more	79.02 (205)	80.72 (306)
Follow-up compliance
Not complied	24.32 (37)	43.24 (74)
Complied	67.08 (243)	69.90 (392)

Abbreviations: gFOBt=guaiac fecal occult blood test; R2=second biennial invitation round; R3=third biennial invitation round.