Mixed logit results
| Attribute/level | General population sample (n=262) | Trial sample (n=42) | ||||
| Coef. (SE; p) | WTP GBP £ (95% CIs) | Significant SD† | Coef. (SE; p) | WTP GBP £ (95% CIs) | Significant SD† | |
| Psychological intervention to be received | ||||||
| Peer group support | −0.012 (0.054; 0.817) | −5 (−50 to 40) | No | 0.082 (0.144; 0.570) | 92 (−224 to 407) | Yes |
| Group psychological therapy (without sharing personal concerns/experiences) | −0.208 (0.056; <0.001*) | −89 (−136 to −42) | Yes | 0.048 (0.147; 0.745) | 54 (−270 to 378) | Yes |
| Group psychological therapy (sharing personal concerns/experiences) | −0.279 (0.063; <0.001*) | −119 (−173 to −65) | Yes | −0.124 (0.147; 0.399) | −139 (−461 to 183) | Yes |
| Individual psychological therapy | 0.500 (0.064; <0.001*)* | 213 (160 to 266) | No | −0.006 (0.185; 0.975) | −2 (−157 to 152) | No |
| The person who provides the psychological therapy | ||||||
| Occupational therapist | −0.023 (0.054; 0.672) | −10 (−55 to 35) | No | 0.026 (0.124; 0.834) | 29 (−245 to 303) | No |
| Cardiac rehabilitation professional | 0.113 (0.053; 0.032*) | 48 (4 to 93) | No | 0.589 (0.131; <0.001*) | 662 (338 to 987) | No |
| Healthcare professional trained in delivery of psychological intervention | −0.145 (0.055; 0.008*) | −62 (−108 to −16) | No | −0.700 (0.166; <0.001*) | −787 (−1180 to −393) | Yes |
| Clinical psychologist | 0.055 (0.054; 0.314) | 23 (−22 to 68) | No | 0.085 (0.162; 0.601) | 36 (−99 to 172) | Yes |
| The information given to you prior to accepting and starting therapy | ||||||
| No information provided | −0.249 (0.055; <0.001*) | −106 (−153 to −59) | No | −0.362 (0.140; 0.010*) | −407 (−718 to −96) | No |
| Printed leaflet of information | −0.028 (0.054; 0.607) | −12 (−57 to 34) | No | 0.072 (0.137; 0.601 | 81 (−219 to 380) | No |
| Overview of the therapy from a healthcare provider with a chance to ask questions | 0.190 (0.053; <0.001*) | 81 (36 to 126) | No | 0.318 (0.122; 0.009*) | 357 (82 to 632) | No |
| Overview of the therapy from a healthcare provider with a chance to ask questions and a printed leaflet | 0.087 (0.053; 0.102) | 37 (−7 to 82) | No | −0.028 (0.143; 0.847) | −12 (−131 to 108) | Yes |
| Location you need to visit to attend psychological therapy sessions | ||||||
| Primary care | −0.135 (0.055; 0.015*) | −57 (−103 to −11) | No | 0.215 (0.146; 0.142) | 241 (−75 to 558) | No |
| Community care | 0.150 (0.052; 0.004*) | 64 (20 to 108) | No | 0.022 (0.122; 0.856) | 25 (−245 to 295) | No |
| Outpatient | −0.074 (0.055; 0.178) | −32 (−78 to 14) | No | −0.026 (0.127; 0.836) | −30 (−309 to 250) | No |
| Tertiary care | 0.058 (0.054; 0.279) | 25 (−20 to 70) | No | −0.211 (0.148; 0.154) | −90 (−213 to 34) | No |
| Cost | ||||||
| NHS cost | −0.002 (0.000; 0.000)* | – | Yes | −0.001 (0.000; 0.000)* | – | Yes |
| Therapy provision | ||||||
| Alternative specific constant‡ | 2.540 (0.149; 0.000)* | 1081 (957 to 1206) | Yes | 1.783 (0.419; 0.000)* | 759 (409 to 1109) | Yes |
*Statistical significance (p<0.05).
†SD is based on the normal distribution assumed for each attribute level in the model. These were interpreted using a statistical significance p<0.05.
‡This constant represents people’s preferences for some form of therapy in CR (specifically one with the mean effect for each of the qualitative attributes and no cost) vs receiving no therapy.
CR, cardiac rehabilitation; GBP, British Pounds; NHS, National Health Service; WTP, willingness to pay.