Uptake of screening and positivity rates expressed as percent

	First round	Second round	Third round
Uptake
Total	55.0	53.0	55.3
Males	50.4	48.7	51.0
Females	59.5	57.1	59.6
Response to first kit	43.8	51.5	53.7
Non-responders in all previous rounds	–	13.8	13.9
Responders in any previous round	–	85.4	85.2
Positivity rate
Total	2.07	1.90	1.16
Males	2.83	2.56	1.52
Females	1.44	1.36	0.86
Non-responders in all previous rounds	–	2.56	1.58
Responders in any previous round	–	1.88	1.10

The differences between males and females in all rounds and in both parameters were statistically significant at the p<0.001 level and the decline of the positivity rate was statistically significant at the p<0.01 level (χ² test).