Table 5.
Study 2: Percentages and means (95% confidence intervals [CI]) for dependent variables, by quantitative information conditions.
| Quantitative information | |||
|---|---|---|---|
| Absent | Present | ||
| N | 452 | 450 | |
| % (CI) | % (CI) | P-value, OR | |
| Gist recall/estimation | |||
| Item 1: False: “Xeravast eliminates the skin problems caused by plaque psoriasis.” | 27.4 (23.3, 31.6) | 33.3 (29.0, 37.7) | 0.05, 1.33 |
| Item 2: Agree: “Plaque psoriasis will improve but skin won’t be back to normal.” | 34.5 (30.1, 38.9) | 41.6 (37.0, 46.1) | 0.03, 1.35 |
| Item 3: True: “More than half of people with plaque psoriasis who take Xeravast will have some skin clearance in 2 months.” | 90.3 (87.5, 93.0) | 93.3 (91.0, 95.6) | 0.09, 1.51 |
| Verbatim recall/estimation | |||
| Item 1: 3 out of 4: “How many people with plaque psoriasis who take Xeravast will have some skin clearance in 2 months?” | 37.8 (33.3, 42.3) | 64.2 (59.8, 68.7) | <0.001, 2.95 |
| Item 2: 65%: “In most cases, Xeravast provided __% skin clearance in 2 months.” | 5.1 (3.0, 7.1) | 53.3 (48.7, 58.0) | <0.001,21.59 |
| Item 3: Higher than 65%: “In most cases, Xeravast provided __% skin clearance in 2 months.” | 38.5 (34.0, 43.0) | 21.6 (17.7, 25.4) | <0.001,0.43 |
| M (CI) | M (CI) | P-value, f | |
| Perceived efficacy (1 = strongly disagree, 6 = strongly agree) | 4.17 (4.07, 4.26) | 4.14 (4.04, 4.24) | 0.71, 0.01 |
Note. OR = odds ratio. Verbatim items 2 and 3 represent two different codes of the same questionnaire item: correct (65%) and overestimated (higher than 65%).