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Table 1 Baseline characteristics by treatment groups

From: Combined nicotine patch with gum versus nicotine patch alone in smoking cessation in Hong Kong primary care clinics: a randomised controlled trial

Characteristic

Single NRT

(N = 286)

Combined NRT (N = 274)

p-value

Age (in years), mean (SD)

50.56 (12.08)

50.41 (12.30)

0.884

Male, No. (%)

236 (82.5)

241 (88.0)

0.091

Marital Status, No. (%)

0.386

 Single

48 (16.8)

37 (13.5)

 

 Married

208 (72.7)

216 (78.8)

 

 Divorced/Separated

23 (8.0)

17 (6.2)

 

 Widowed

7 (2.4)

4 (1.5)

 

Education, No. (%)

0.565

 No formal schooling

3 (1.0)

7 (2.6)

 

 Primary

60 (21.0)

61 (22.3)

 

 Secondary

203 (71.0)

187 (68.2)

 

 Tertiary

20 (7.0)

19 (6.9)

 

Work status, No. (%)

0.310

 Unemployed

61 (21.3)

47 (17.2)

 

 Full time

181 (63.3)

188 (68.6)

 

 Part time

16 (5.6)

8 (2.9)

 

 Retired

20 (7.0)

24 (8.8)

 

 Housewife

8 (2.8)

7 (2.6)

 

Payment status, No. (%)

0.506

 Entitled patients

234 (81.8)

220 (80.3)

 

 Waivers

18 (6.3)

24 (8.8)

 

 Hospital Authority staff/Civil servants

29 (10.1)

28 (10.2)

 

 Others

5 (1.7)

2 (0.7)

 

Cluster, No. (%)

0.946

 HKEC

56 (19.6)

56 (20.4)

 

 KCC

55 (19.2)

57 (20.8)

 

 KEC

61 (21.3)

51 (18.6)

 

 NTEC

57 (19.9)

55 (20.1)

 

 NTWC

57 (19.9)

55 (20.1)

 

Co-existing diseases

 Respiratory disease, No. (%)

18 (6.3)

15 (5.5)

0.816

 CVS disease, No. (%)

105 (36.7)

80 (29.2)

0.072

 Endocrine disease, No. (%)

59 (20.6)

54 (19.7)

0.868

Smoking history

 No. of cigarettes/day used, mean (SD)

18.44 (6.90)

18.68 (6.88)

0.683

 Heavy Smoker (≥20 cigarettes/day), No. (%)

162 (56.6)

155 (56.6)

0.988

 Years smoked, mean (SD)

31.93 (11.94)

32.17 (12.43)

0.817

 Pack-years, mean (SD)

29.45 (15.37)

30.18 (16.65)

0.591

 Fagerstrom score, mean (SD)

5.57 (2.01)

5.85 (1.79)

0.090

Fagerstrom score, No. (%)

0.347

 Low dependence (0–2)

22 (7.7)

12 (4.4)

 

 Low to Moderate (3, 4)

58 (20.3)

51 (18.6)

 

 Moderate (5–7)

160 (55.9)

161 (58.8)

 

 High dependence (8+)

46 (16.1)

50 (18.2)

 

 Baseline CO level (ppm), mean (SD)

20.36 (12.03)

20.83 (12.49)

0.652

  1. Note: NRT Nicotine replacement therapy, SD Standard deviation
  2. For all continuous variables, mean and SD were reported and p-values were calculated from two sample t-test; for all categorical variables, number and proportion were reported and p-values were calculated from Chi-square test