Table 3.
Determinants of use of the patient decision aid (n = 123)
| Variables | Categories/range | Users PtDA (n = 69) |
Non-users PtDA (n = 53) |
P a |
|---|---|---|---|---|
| Sociodemographic variables | ||||
| Age, years | 52 ± 13 (69) | 58 ± 12 (53) | 0.003b | |
| Gender, % (n) | Women | 57 % (39) | 68 % (36) | |
| Men | 43 % (30) | 32 % (17) | n.s. | |
| Marital status, % (n) | Married/living with partner | 87 % (60) | 91 % (48) | |
| Not married/living alone | 13 % (9) | 9 % (5) | n.s. | |
| Education, % (n) | Low | 20 % (14) | 43 % (23) | |
| Medium | 51 % (35) | 47 % (25) | ||
| High | 29 % (20) | 9 % (5) | 0.004 | |
| Employment, % (n) | Employed/studying | 65 % (33) | 69 % (24) | |
| Not employed/studying | 35 % (18) | 31 % (11) | n.s. | |
| Health-related variables | ||||
| Diagnosis, % (n) | Rheumatoid Arthritis | 81 % (52) | 80 % (39) | |
| Psoriatic Arthritis | 13 % (8) | 14 % (7) | ||
| Ankylosing Spondylitis | 6 % (4) | 6 % (3) | n.s. | |
| Years since diagnosis, % (n) | <1 | 19 % (13) | 32 % (17) | |
| 1–5 | 43 % (29) | 40 % (21) | ||
| 6–10 | 13 % (9) | 9 % (5) | ||
| >10 | 25 % (17) | 19 % (10) | n.s. | |
| Pain (NRS) | Range 0–10 | 4.7 ± 2.5 (69) | 4.8 ± 2.8 (53) | n.s.b |
| Physical function (HAQ-II) | range 0–3 | 2.14 ± 0.70 (69) | 2.10 ± 0.71 (53) | n.s.b |
| Preference-related variables | ||||
| Preferred role in decision-making (CPS), % (n) | (Mostly) doctor | 9 % (6) | 8 % (4) | |
| Shared | 78 % (54) | 75 % (39) | ||
| (Mostly) patient | 13 % (9) | 17 % (9) | n.s. | |
| Need for information (CPQ) | range 1–5 | 4.6 ± 0.6 (69) | 4.5 ± 0.7 (121) | n.s.b |
| Number of treatment options | ||||
| Suggested by rheumatologist, % (n) | 1 option | 38 % (23) | 73 % (36) | |
| >1 option | 62 % (38) | 27 % (13) | 0.000 | |
Values are the mean ± standard deviation (number) unless otherwise indicated. Percentages do not include missing cases. aTested using the Pearson chi-square tests unless otherwise indicated. bTested using the t test. PtDA patient decision aid, n.s. not significant (p > 0.05), NRS numerical rating scale, HAQ-II Health Assessment Questionnaire, version 2 [28], CPS Control Preference Scale [5, 29], CPQ Cologne Preference Questionnaire [30, 31]]