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Table 6 Logistic regression model for outcome 4: all-cause readmission between 31 days and 1 year after discharge (n = 1534)

From: Evaluation of a hospital-initiated tobacco dependence treatment service: uptake, smoking cessation, readmission and mortality

 

Category

Unadjusted OR (95%CI)

p-value

Adjusted OR (95%CI)

p-value

Readmission 31 days to 1 year

 Hospital

A

(Ref.)

 

(Ref.)

 

B

0.47 (0.36–0.61)

 < 0.001

0.68 (0.51–0.92)

0.012

 Age on admission

60 + 

(Ref.)

 

(Ref.)

 

40–59

0.93 (0.72–1.21)

0.596

1.38 (1.02–1.88)

0.040

25–39

0.45 (0.32–0.63)

 < 0.001

0.87 (0.57–1.32)

0.515

16–24

0.44 (0.25–0.78)

0.005

0.91 (0.48–1.75)

0.785

 Sex

Male

(Ref.)

 

(Ref.)

 

Female

1.10 (0.87–1.38)

0.448

1.09 (0.84–1.41)

0.508

 Ethnicity

White

(Ref.)

 

(Ref.)

 

Black

0.81 (0.57–1.14)

0.225

1.11 (0.76–1.63)

0.582

Mixed/Asian/Othera

0.78 (0.55–1.12)

0.175

1.09 (0.73–1.64)

0.670

 Intention at first TDS assessment

Declined/withdrawal management1

(Ref.)

 

(Ref.)

 

Quit attempt

0.81 (0.63–1.06)

0.119

0.93 (0.68–1.27)

0.644

 Heaviness of Smoking Index

Low

(Ref.)

 

(Ref.)

 

Medium

1.16 (0.88–1.53)

0.293

0.80 (0.57–1.12)

0.194

High

1.09 (0.65–1.81)

0.743

0.70 (0.39–1.26)

0.229

 Smoking cessation aids

None

(Ref.)

 

(Ref.)

 

Single

1.46 (1.09–1.97)

0.012

1.46 (1.06–2.01)

0.022

Combination

1.60 (1.23–2.08)

 < 0.001

1.33 (0.97–1.82)

0.079

 Primary diagnosis

Smoking-related

1.43 (1.08–1.91)

0.013

1.24 (0.90–1.71)

0.197

 Past diagnoses

Cancer

2.84 (1.78–4.55)

 < 0.001

1.65 (1.09–2.51)

0.018

COPD

3.23 (2.45–4.26)

 < 0.001

2.00 (1.48–2.71)

 < 0.001

CVD

2.83 (1.99–4.01)

 < 0.001

2.00 (1.40–2.84)

 < 0.001

Diabetes

2.35 (1.72–3.20)

 < 0.001

1.41 (1.03–1.92)

0.032

Mental and behav

3.08 (2.28–4.23)

 < 0.001

2.69 (1.98–3.63)

 < 0.001

 IMD tertile

Lower

(Ref.)

 

(Ref.)

 

Middle

0.85 (0.64–1.12)

0.248

0.90 (0.67–1.22)

0.504

Upper

0.71 (0.43–1.17)

0.183

0.84 (0.49–1.44)

0.529

 Smoking status 30 days

Smoker or unknownb

(Ref.)

 

(Ref.)

 

Non-smoker

0.76 (0.50–1.17)

0.216

0.83 (0.51–1.35)

0.461

  1. Unadjusted and fully adjusted estimates from logistic regression model for outcome 4: all-cause readmission between 31 days and 1 year after discharge, using imputed analysis and excluding patients who died within a year of discharge, or who were readmitted within 30 days, as well as patients resident outside of London (n = 1534). Adjusted model adjusted for all variables in the table
  2. IMD Index of Multiple Deprivation, HSI Heaviness of Smoking Index, CVD cardiovascular disease
  3. aCategories collapsed due to sparse data
  4. bPatients with ‘unknown’ smoking status were presumed to be smokers, as per previous studies [8, 11]