# Table 4 Regression coefficients and odds ratios of Generalised Estimation Equations of perceived cues, perceived susceptibility, perceived severity, and knowledgea,b

2012–2017 β (95% CI)

2012–2015 β (95% CI)

2015–2017 β (95% CI)

p-valuec

Perceived cues

0.052 (0.013 to 0.091)*

−0.026 (−0.067 to 0.015)

0.119 (0.066 to 0.172)**

p = 0.002

Perceived susceptibility

0.014 (−0.032 to 0.059)

0.010 (−0.033 to 0.053)

0.043 (−0.002 to 0.088)

p = 0.044

Perceived severity

0.015 (−0.025 to 0.054)

− 0.010 (− 0.052 to 0.032)

−0.006 (− 0.032 to 0.021)

p = 0.764

Knowledge – sum score

0.194 (0.090 to 0.299)**

0.116 (0.028 to 0.203)*

0.184 (0.088 to 0.280)**

p < 0.001

Blindness

1.465 (1.309 to 1.641)**

1.250 (1.097 to 1.425)*

1.867 (1.645 to 2.120)**

p < 0.001

Heart disease

1.116 (1.013 to 1.229)

1.113 (1.013 to 1.222)

1.114 (0.994 to 1.249)

p = 0.051

Impotence

1.185 (1.085 to 1.294)**

1.106 (1.018 to 1.200)

1.183 (1.076 to 1.302)*

p < 0.001

Lung cancer

0.907 (0.803 to 1.025)

1.087 (0.965 to 1.226)

0.910 (0.802 to 1.033)

p = 0.053

Mouth and throat cancer

1.121 (1.103 to 1.241)**

1.136 (1.033 to 1.249)*

1.178 (1.047 to 1.327)*

p = 0.031

Stroke

1.170 (1.074 to 1.275)**

1.107 (1.017 to 1.205)

1.112 (1.007 to 1.226)

p = 0.001

Lung cancer due to SHS

1.022 (0.941 to 1.108)

0.976 (0.900 to 1.060)

1.050 (0.960 to 1.150)

p = 0.095

Heart disease due to SHS

1.080 (0.996 to 1.171)

1.042 (0.958 to 1.132)

1.159 (1.055 to 1.273)*

p = 0.106

1. SHS secondhand smoke
2. a: Estimates were weighted for age, and gender
3. b: Analyses were controlled for age group, gender, educational level, level of addiction to tobacco, intention to quit smoking, and ever having made a quit attempt
4. c: Of the interaction term between the intervention factor (introduction of PHWs) and Wave, in the GEE analysis over the years 2012–2017
5. *p < 0.01, **p < 0.001