| |
No incentive (n = 316)
|
Promised HK$100 incentive (n = 326)
|
Promised HK$200 incentive (n = 283)
|
Mixed incentive (n = 321)
|
P-value
|
|---|
|
Sex
| | | | |
0.82
|
|
Male
|
264 (83.8)
|
277 (85.0)
|
243 (85.9)
|
268 (83.5)
| |
|
Female
|
51 (16.2)
|
49 (15.0)
|
40 (14.1)
|
53 (16.5)
| |
|
Age group (years)
| | | | |
0.49
|
|
< =39
|
59 (18.9)
|
51 (15.6)
|
51 (18.0)
|
64 (19.9)
| |
|
40–59
|
132 (42.0)
|
134 (41.1)
|
102 (36.0)
|
129 (40.2)
| |
|
> =60
|
123 (39.2)
|
141 (43.3)
|
130 (45.9)
|
128 (39.9)
| |
|
Education level
|
|
Primary or below
|
63 (20.2)
|
71 (21.8)
|
69 (24.4)
|
69 (21.6)
|
0.80
|
|
Secondary
|
189 (60.6)
|
188 (57.7)
|
159 (56.2)
|
178 (55.8)
| |
|
Tertiary
|
60 (19.2)
|
67 (20.6)
|
55 (19.4)
|
72 (22.6)
| |
|
Marital status
| | | | |
0.57
|
|
Single
|
63 (20.2)
|
53 (16.3)
|
50 (17.9)
|
66 (20.8)
| |
|
Married / Cohabit
|
222 (71.2)
|
233 (71.5)
|
198 (70.7)
|
215 (67.8)
| |
|
Divorced/Separated/Widowed
|
27 (8.7)
|
40 (12.3)
|
32 (11.4)
|
36 (11.4)
| |
|
Employment status
| | | | |
0.31
|
|
Employed
|
182 (58.1)
|
180 (55.4)
|
139 (50.4)
|
186 (58.3)
| |
|
Retired
|
100 (31.9)
|
119 (36.6)
|
105 (38.0)
|
100 (31.4)
| |
|
Others
|
31 (9.9)
|
26 (8.0)
|
32 (11.6)
|
33 (10.3)
| |
|
Monthly household income (HKD; US$1 = HK$7.8)
| | |
0.29
|
|
Below $10,000
|
65 (23.4)
|
57 (19.8)
|
54 (21.9)
|
52 (18.7)
| |
|
$10,000–$29,999
|
95 (34.2)
|
99 (34.4)
|
101 (40.9)
|
96 (34.5)
| |
|
$30,000 or above
|
118 (42.4)
|
132 (45.8)
|
92 (37.2)
|
130 (46.8)
| |
|
Had children
|
219 (71.3)
|
246 (76.4)
|
209 (75.5)
|
220 (69.8)
|
0.19
|
|
Had children under 16 years
|
46 (15.0)
|
65 (20.3)
|
55 (20.0)
|
54 (17.1)
|
0.28
|
|
Place of origin
| | | | |
0.57
|
|
Hong Kong
|
181 (58.4)
|
188 (58.6)
|
164 (58.8)
|
200 (63.5)
| |
|
China Mainland
|
118 (38.1)
|
127 (39.6)
|
108 (38.7)
|
105 (33.3)
| |
|
Others
|
11 (3.5)
|
6 (1.9)
|
7 (2.5)
|
10 (3.2)
| |
|
Perceived health status
| | | |
1.00
|
|
Extremely /very good
|
85 (27.6)
|
99 (30.8)
|
79 (28.4)
|
92 (29.1)
| |
|
Good
|
83 (26.9)
|
80 (24.9)
|
79 (28.4)
|
82 (25.9)
| |
|
Fair
|
115 (37.3)
|
117 (36.4)
|
97 (34.9)
|
118 (37.3)
| |
|
Bad
|
25 (8.1)
|
25 (7.8)
|
23 (8.3)
|
24 (7.6)
| |
|
Time to first smoking after waking
| | | |
0.57
|
|
<5 min
|
72 (26.2)
|
76 (25.5)
|
71 (28.1)
|
75 (25.8)
| |
|
6–30 min
|
69 (25.1)
|
84 (28.2)
|
71 (28.1)
|
91 (31.3)
| |
|
31–60 min
|
37 (13.5)
|
29 (9.7)
|
31 (12.3)
|
40 (13.7)
| |
|
After 60 min
|
97 (35.3)
|
109 (36.6)
|
80 (31.6)
|
85 (29.2)
| |
|
Daily cigarette users
| | | | |
0.11
|
|
Yes
|
256 (82.1)
|
250 (77.2)
|
240 (84.8)
|
261 (81.6)
| |
|
No
|
56 (17.9)
|
74 (22.8)
|
43 (15.2)
|
59 (18.4)
| |
|
Daily cigarette consumption (sticks)
| | |
0.17
|
|
1–10
|
149 (52.5)
|
150 (53.8)
|
111 (43.4)
|
145 (49.8)
| |
|
11–20
|
114 (40.1)
|
115 (41.2)
|
126 (49.2)
|
118 (40.5)
| |
|
21–30
|
13 (4.6)
|
11 (3.9)
|
13 (5.1)
|
16 (5.5)
| |
|
>30
|
8 (2.8)
|
3 (1.1)
|
6 (2.3)
|
12 (4.1)
| |
|
Intention to quit
| | | | |
0.93
|
|
No intention
|
169 (54.9)
|
172 (54.6)
|
153 (55.4)
|
177 (56.5)
| |
|
Within 30 days
|
49 (15.9)
|
54 (17.1)
|
41 (14.9)
|
42 (13.4)
| |
|
After 30 days
|
90 (29.2)
|
89 (28.3)
|
82 (29.7)
|
94 (30.0)
| |
|
Ever used Ecigs or HTP
| | | |
0.24
|
|
Yes
|
72 (22.8)
|
72 (22.1)
|
50 (17.7)
|
78 (24.3)
| |
|
No
|
244 (77.2)
|
254 (77.9)
|
233 (82.3)
|
243 (75.7)
| |
- Mixed incentive: Prepaid HK$100 incentive and promised HK$100 incentive; Ecigs or HTP: E-cigaretes or heated tobacco products; Sample sizes varied because missing responses on some variables were not included in the percentage calculation. P-value calculated by Chi-squared test for categorical variables. All differences were due to chance (from randomization), and P values are for reference only
