Table 2.
Mean Preference Ratings of Graphical Displays of Risk Information (SD)
| Display† | Overall | Non-Caucasian | Caucasian | Lower income | Higher income | Lower education | Higher education | |
|---|---|---|---|---|---|---|---|---|
| (n = 40) | (n = 20) | (n = 20) | (n = 24) | (n = 16) | (n = 9) | (n = 31) | ||
| 1. | Bar graph | 4.0‡(1.0) | 3.5(1.1) | 4.4 (0.7) | 4.0(1.0) | 3.9(1.0) | 3.4(1.2) | 4.1 (0.9) |
| 2. | Line graph | 3.1 (0.9) | 3.2(0.9) | 3.0 (0.9) | 3.0(1.0) | 3.2(0.8) | 2.9(1.1) | 3.1 (0.9) |
| 3. | Thermometer | 2.6(1.1) | 2.7(1.0) | 2.5(1.1) | 2.6(1.1) | 2.6(1.1) | 2.4 (0.9) | 2.7(1.1) |
| graph | ||||||||
| 4. | 100 faces | 2.4(1.5) | 2.6(1.5) | 2.2(1.5) | 2.8(1.5) | 1.8(1.3) | 3.3(1.1) | 2.1 (1.5) |
| 5. | Survival curves § | 2.5(1.1) | 2.3(1.1) | 2.9(1.0) | 2.6(1.2) | 2.4 (0.9) | 2.6(1.1) | 2.5(1.1) |
†Lower income reflects annual household income below $49,999; higher income reflects annual household income above $50,000. Lower education reflects completion of grades 9–12 or Technical/Vocational school. Higher education reflects 2 or 4 years of college or a post-graduate degree. ‡Wilcoxon signed rank test for difference between bar and line graph ratings (p < 0.001). § Presented to 35 participants (20 non-Caucasian, 15 Caucasians; 22 lower income, 13 higher income; 7 lower education, 28 higher education). Percentages reflect appropriate adjustments.