. The percentages of those who thought that an item was important or very important to them, were for the 138 attenders and the 210 non-attenders respectively: "to receive a personal invitation letter": 90.6 vs. 48.1% (p<0.05); "a preliminary visit to the GP": 9.4 vs. 34.3% (p<0.05); "possibility of examination outside business hours": 15.9 vs. 30.0% (p<0.05).