Table 2.
Association of proposed instrument and outcomes of other patients who saw the GP on the same day as they issued a smoking cessation therapy to an index patient (n = 101861)
| Robust linear regression | |||
|---|---|---|---|
| Risk difference*100 | 95% confidence interval | ||
| Lower | Upper | ||
| Male | 0.77 | 0.02 | 1.52 |
| Age (years)a | −0.35 | −0.65 | −0.05 |
| Number of GP visits in previous yeara | −0.35 | −0.61 | −0.08 |
| Diagnoses in the previous year | |||
| Autism | 0.00 | −0.02 | 0.02 |
| Bipolar | −0.01 | −0.05 | 0.03 |
| Current smoker | 0.28 | −0.51 | 1.07 |
| Dementia | 0.00 | −0.12 | 0.13 |
| Depression | −0.04 | −0.42 | 0.35 |
| Eating disorder | −0.02 | −0.05 | 0.02 |
| Hyperkinetic disorder | 0.00 | −0.01 | 0.01 |
| Learning disability | −0.01 | −0.06 | 0.05 |
| Neurotic disorder | 0.56 | 0.29 | 0.84 |
| Other behavioural disorder | −0.01 | −0.04 | 0.01 |
| Personality disorder | 0.02 | −0.03 | 0.07 |
| Schizophrenia | 0.00 | −0.05 | 0.05 |
| Alcohol misuse | 0.08 | −0.06 | 0.22 |
| Probable self-harm | −0.01 | −0.01 | 0.00 |
| Drug misuse | 0.03 | −0.04 | 0.11 |
| Fractures | 0.03 | −0.15 | 0.21 |
| Any psychiatric illness | 0.36 | −0.10 | 0.81 |
| Chronic disease | 0.12 | −0.34 | 0.59 |
| Prescriptions in the previous year | |||
| Antidepressant | 0.44 | −0.28 | 1.17 |
| Antipsychotic | 0.17 | −0.18 | 0.52 |
| CNS stimulant | 0.02 | −0.02 | 0.05 |
| Dementia medication | 0.00 | −0.12 | 0.13 |
| Hypnotic anxiolytic | −0.02 | −0.40 | 0.35 |
| Lithium | 0.07 | −0.01 | 0.16 |
Robust standard errors clustered by physician reported.
*Mean differences reported. Each outcome was defined as an event in the year after the index prescription.