Table 4.
Effect size (ES) and summary data of outcomes where presented for 4 included studies∗
| Author | Outcome | Participants, no. | Intervention, mean ± SD | Control, mean ± SD | ES (95% CI) |
|---|---|---|---|---|---|
| Hill and Bird, 2003 (41) | Knowledge | nI = 51 | Pretest 2.8 ± 3.5 | Pretest 2.57 ± 2.54 | 0.22 (−0.19, 0.62) |
| nC = 49 | Posttest 10.8 ± 2.03 | Posttest 9.90 ± 2.46 | |||
| Walker et al, 2007 (46) | Knowledge | nI = 175 | PKQ 62.26 ± 9.12 | PKQ 63.28 ± 7.96 | −0.013 (−0.22, 0.19) |
| nC = 188 | Increase in knowledge 6.45 (95% CI 3.78, 10) | Increase in knowledge 6.56 (95% CI 3.36, 8.75) | |||
| Rudd et al, 2009 (44) | Self-efficacy, 6 months | nI = 49 | Pretest 2.78 ± 0.49 | Pretest 2.87 ± 0.48 | 0.39 (0.009, 0.775) |
| nC = 57 | Posttest 2.83 ± 0.54 | Posttest 2.73 ± 0.59 | |||
| Self-efficacy, 12 months | nI = 48 | Pretest 2.78 ± 0.49 | Pretest 2.87 ± 0.48 | 0.454 (0.069, 0.839) | |
| nC = 57 | Posttest 2.91 ± 0.63 | Posttest 2.78 ± 0.59 | |||
| SF-36, 6 months | nI = 49 | Pretest 74.8 ± 12.6 | Pretest 75.0 ± 18.4 | 0.413 (−0.554, 1.38) | |
| nC = 57 | Posttest 77.7 ± 14.1 | Posttest 71.3 ± 23.9 | |||
| SF-36, 12 months | nI = 48 | Pretest 74.8 ± 12.6 | Pretest 75.0 ± 18.4 | 0.362 (−0.511, 1.236) | |
| nC = 57 | Posttest 78.6 ± 15.3 | Posttest 73.0 ± 19.2 | |||
| Rana et al, 2010 (42) | Arthritis-related illness | nI = 425 | Dichotomous variables | OR 1.9 (1.3–2.8) | |
| Self-reported health | nC = 414 | Dichotomous variables | OR 1.4 (1.0–1.9) |
95% CI = 95% confidence interval; nI = intervention; nC = control; PKQ = Patient Knowledge Questionnaire; SF-36 = Short Form 36 health survey; OR = odds ratio.