Table 1 Summary statistics describing sample (N = 2067), stratified by hospital site

Age on admission

16–24

126

6.1

85

6.1

41

6.1

0.993

25–39

427

20.7

283

20.3

144

21.4

40–59

784

37.9

524

37.6

260

38.6

60 + 

679

32.8

451

32.4

228

33.9

Missing

51

2.5

51

3.7

0

0.0

Sex

Male

1334

64.5

912

65.4

422

62.7

0.170

Female

723

35.0

472

33.9

251

37.3

Missing

10

0.5

10

0.7

0

0.0

Ethnicity

Asian

61

3.0

48

3.4

13

1.9

 < 0.001

Black

238

11.5

113

8.1

125

18.6

White

1306

63.2

917

65.8

389

57.8

Mixed

43

2.1

22

1.6

21

3.1

Other

117

5.7

54

3.9

63

9.4

Declined or not stated

234

11.3

172

12.3

62

9.2

Missing

68

3.3

68

4.9

0

0.0

IMD tertile

Lower

855

41.4

526

37.7

329

48.9

 < 0.001

Middle

509

24.6

316

22.7

193

28.7

Upper

133

6.4

74

5.3

59

8.8

Missing

570

27.6

478

34.3

92

13.7

HSI category

Low

348

16.8

154

11.0

194

28.8

 < 0.001

Medium

774

37.4

480

34.4

294

43.7

High

108

5.2

66

4.7

42

6.2

Missing

837

40.5

694

49.8

143

21.2

Smoking cessation aids

None

886

42.9

560

40.2

326

48.4

 < 0.001

Single

470

22.7

311

22.3

159

23.6

Combination

700

33.9

523

37.5

177

26.3

Missing

11

0.5

0

0

11

1.6

Smoking-related diagnosis

Yes

399

19.3

246

17.6

153

22.7

0.866

No

1257

60.8

783

56.2

474

70.4

Missing

411

19.9

365

26.2

46

6.8

Presenting primary diagnosis

Injury, poisoning, and external

306

14.8

127

9.1

179

26.6

 < 0.001

Digestive

215

10.4

116

8.3

99

14.7

Mental and behavioural

214

10.4

190

13.6

24

3.6

Respiratory

205

9.9

145

10.4

60

8.9

Circulatory

131

6.3

77

5.5

54

8.0

Endocrine and blood

106

5.1

67

4.8

39

5.8

Genitourinary

64

3.1

33

2.4

31

4.6

Neoplasms

63

3.0

24

1.7

39

5.8

Infectious and parasitic

49

2.4

23

1.6

26

3.9

Musculoskeletal

47

2.3

27

1.9

20

3.0

Nervous system

46

2.2

31

2.2

15

2.2

Skin and subcutaneous

37

1.8

25

1.8

12

1.8

Others

173

8.4

144

10.3

29

4.3

Missing

411

19.9

365

26.2

46

6.8

Past diagnoses

Cancer

217

10.5

179

12.8

38

5.6

 < 0.001

COPD

557

26.9

402

28.8

155

23.0

0.006

CVD

310

15.0

234

16.8

76

11.3

0.001

Diabetes

438

21.2

367

26.3

71

10.5

 < 0.001

Mental and behavioural

1375

66.5

1039

74.5

336

49.9

 < 0.001

Intention at first TDS assessment

Patient declined

407

19.7

340

24.4

67

10.0

 < 0.001

Withdrawal management

1100

53.2

805

57.7

295

43.8

Quit attempt

542

26.2

242

17.4

300

44.6

Missing

18

0.9

7

0.5

11

1.6