Table 1.
Results of logistic regression analysis investigating predictors of improvement in the internet-enabled cognitive–behavioural therapy cohort (n = 2101)a
| Predictor variable | Mean/prevalence | b | s.e. | Wald's statistic, z2 | P | Subgroup n | Improvement rate, % |
|---|---|---|---|---|---|---|---|
| Gender, % | |||||||
| Men | 27.3 | – | – | – | – | 574 | 60.1 |
| Women | 72.1 | 0.04 | 0.11 | 0.15 | 0.698 | 1514 | 62.2 |
| Unknown/not stated | 0.6 | −0.24 | 0.59 | 0.17 | 0.682 | 13 | 53.8 |
| Age, years: mean | 36.8 | 0.12 | 0.05 | 5.87 | 0.015* | – | – |
| Long-term physical conditions, % | |||||||
| No | 34.3 | – | – | – | – | 721 | 60.9 |
| Yes | 20.8 | −0.32 | 0.14 | 5.29 | 0.021* | 436 | 59.9 |
| Unknown/not stated | 44.9 | 0.02 | 0.11 | 0.05 | 0.819 | 944 | 62.9 |
| Diagnosis,b % | |||||||
| Anxiety | 42.1 | – | – | – | – | 885 | 61.4 |
| Depression | 22.6 | 0.03 | 0.13 | 0.04 | 0.851 | 474 | 60.1 |
| Other | 35.3 | 0.13 | 0.11 | 1.30 | 0.254 | 742 | 62.8 |
| Psychotropic medication, % | |||||||
| Prescribed not taking | 8.1 | – | – | – | – | 171 | 59.6 |
| Prescribed taking | 38.3 | 0.24 | 0.18 | 1.78 | 0.182 | 805 | 63.6 |
| Not prescribed | 52.5 | 0.26 | 0.18 | 2.05 | 0.152 | 1103 | 60.4 |
| Unknown/not stated | 1.0 | 0.23 | 0.49 | 0.21 | 0.649 | 22 | 63.6 |
| StartPhq9, mean | 12.7 | 0.05 | 0.07 | 0.50 | 0.479 | – | – |
| StartGad7, mean | 11.9 | 0.53 | 0.06 | 70.91 | <0.001*** | – | – |
| WaitingSAQ, days: mean | 3.0 | 0.01 | 0.06 | 0.02 | 0.894 | – | – |
| WaitingAssignment, days: mean | 0.8 | −0.04 | 0.06 | 0.44 | 0.508 | – | – |
| WaitingContact, days: mean | 1.1 | −0.07 | 0.08 | 0.93 | 0.336 | – | – |
| WaitingAssessment, days: mean | 7.6 | −0.14 | 0.05 | 7.54 | 0.006** | – | – |
| WaitingTreatment, days: mean | 8.9 | −0.02 | 0.05 | 0.18 | 0.671 | – | – |
| NumberSessions, sessions: mean | 5.5 | 0.29 | 0.05 | 32.09 | <0.001*** | – | – |
| NumberDNA, sessions: mean | 0.5 | −0.01 | 0.05 | 0.06 | 0.813 | – | – |
StartPhq9, Patient Health Questionnaire-9 score at assessment; StartGad7, General Anxiety Disorder-7 score at assessment; Waiting SAQ, time between referral and patient completing self-assessment questionnaire; WaitingAssignment, waiting time from patient completing the self-assessment questionnaire and therapist assignment; WaitingContact, waiting time between therapist assignment and first contact by the therapist; WaitingAssessment, waiting time between first contact from the therapist and clinical assessment appointment; WaitingTreatment, waiting time between clinical assessment and first therapy session; NumberSessions, total number of therapy sessions attended by the patient; NumberDNA, number of scheduled appointments the patient failed to attend.
Men, long-term physical conditions ‘no’, diagnosis ‘anxiety’ and psychotropic medication ‘prescribed not taking’ were reference classes for the categorical variables.
The diagnosis anxiety encompasses patients diagnosed with agoraphobia, generalised anxiety disorder, hypochondriacal disorder, obsessive–compulsive disorder, panic disorder, post-traumatic stress disorder, social phobia, specific phobia or anxiety disorder unspecified. The diagnosis depression encompasses patients diagnosed with depressive episode, dysthymia or recurrent depressive disorder. The diagnosis ‘other’ encompasses all diagnoses not otherwise listed (for example chronic pain, bereavement, eating disorders).
*P<0.05, **P<0.01, ***P<0.001.