Table 3.
Differences in psychological variables between screening attenders and control participants after 3-6 months* and 12-15 months* of follow-up. Values are mean (SD) unless stated otherwise
| Psychological variables and time | Control (group A+B), non-screening | Screened negative | Difference† (95% CI); P value | Screened negative at random blood glucose test | Screened negative at fasting blood glucose test | Screened negative at oral glucose tolerance test | Screened positive at oral glucose tolerance test |
|---|---|---|---|---|---|---|---|
| Personal risk | |||||||
| 3-6 months | 31.7 (21.2) (n=418) | 31.5 (21.0) (n=2195) | −0.45 (−3.28 to 2.39); 0.76 | 30.9 (20.8) (n=1487) | 31.7 (20.4) (n=631) | 44.2 (25.9) (n=77) | NA‡ |
| 12-15 months | 32.8 (20.7) (n=362) | 32.2 (21.4) (n=2186) | −0.78 (−3.91 to 2.35); 0.63 | 31.6 (21.1) (n=1469) | 32.2 (21.0) (n=631) | 42.6 (26.5) (n=86) | NA‡ |
| Comparative risk | |||||||
| 3-6 months | 2.86 (0.94) (n=426) | 2.84 (0.95) (n=2238) | −0.02 (−0.13 to 0.09); 0.74 | 2.83 (0.94) (n=1516) | 2.82 (0.93) (n=644) | 3.23 (1.18) (n=78) | NA‡ |
| 12-15 months | 2.95 (0.95) (n=369) | 2.85 (0.96) (n=2222) | −0.11 (−0.21 to 0); 0.068 | 2.80 (0.96) (n=1495) | 2.91 (0.94) (n=639) | 3.16 (1.03) (n=88) | NA‡ |
| Intention to reduce dietary fat | |||||||
| 3-6 months | 3.68 (0.84) (n=448) | 3.70 (0.87) (n=2294) | 0.01 (−0.07 to 0.10); 0.75 | 3.69 (0.85) (n=1551) | 3.68 (0.89) (n=661) | 3.95 (0.86) (n=82) | 4.10 (0.70) (n=80) |
| 12-15 months | 3.68 (0.85) (n=385) | 3.66 (0.86) (n=2292) | −0.01 (−0.10 to 0.08); 0.83 | 3.70 (0.86) (n=1541) | 3.59 (0.87) (n=662) | 3.72 (0.69) (n=89) | 4.03 (0.79) (n=78) |
| Intention to reduce dietary sugar | |||||||
| 3-6 months | 3.58 (0.91) (n=447) | 3.60 (0.91) (n=2284) | 0.02 (−0.07 to 0.12); 0.67 | 3.59 (0.90) (n=1543) | 3.60 (0.92) (n=659) | 3.83 (0.94) (n=82) | 4.28 (0.75) (n=80) |
| 12-15 months | 3.58 (0.88) (n=383) | 3.60 (0.92) (n=2291) | 0.02 (−0.08 to 0.12); 0.70 | 3.62 (0.92) (n=1542) | 3.54 (0.92) (n=661) | 3.72 (0.79) (n=88) | 4.19 (0.97) (n=78) |
| Intention to increase exercise | |||||||
| 3-6 months | 3.60 (0.81) (n=447) | 3.56 (0.82) (n=2288) | −0.04 (−0.14 to 0.06); 0.48 | 3.59 (0.82) (n=1550) | 3.49 (0.84) (n=656) | 3.65 (0.82) (n=82) | 3.81 (0.71) (n=80) |
| 12-15 months | 3.53 (0.87) (n=385) | 3.55 (0.84) (n=2293) | 0.03 (−0.08 to 0.14); 0.62 | 3.59 (0.84) (n=1541) | 3.48 (0.84) (n=663) | 3.49 (0.84) (n=89) | 3.56 (0.85) (n=78) |
| Self-rated health | |||||||
| 3-6 months | 3.14 (0.80) (n=443) | 3.14 (0.87) (n=2287) | 0.01 (−0.15 to 0.16); 0.94 | 3.17 (0.86) (n=1553) | 3.09 (0.88) (n=654) | 2.98 (0.93) (n=80) | 2.97 (0.85) (n=78) |
| 12-15 months | 3.21 (0.81) (n=383) | 3.16 (0.86) (n=2284) | −0.05 (−0.21 to 0.11); 0.53 | 3.19 (0.85) (n=1533) | 3.12 (0.87) (n=662) | 3.04 (0.84) (n=89) | 3.12 (0.82) (n=78) |
NA=not applicable.
*Time since initial random blood glucose test for screening groups; time since first contact for control group.
†Screen negative group minus control group.
‡Participants who screened positive at oral glucose tolerance test were not asked about their perceived risk of getting diabetes at follow-up time points.