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Table 3 Summary of the smoking status varying coefficient model (Model X)

From: Application of the varying coefficient model to the behaviour risk factor surveillance data in Italy: a study of changing smoking prevalence among sub-populations

Variable

OR (95% C.I.)

p-value

Age (Reference: 60-59)

18-29

2.08 (1.91-2.25)

<0.001

30-39

1.79 (1.64-1.95)

<0.001

40-49

1.75 (1.61-1.89)

<0.001

50-59

1.46 (1.34-1.60)

<0.001

s(time):18-29

-

0.003

s(time):30-39

-

0.649

s(time):40-49

-

0.046

s(time):50-59

-

0.619

s(time):60-69

-

0.621

Sex (Reference: Female)

Male

1.61 (1.58-1.64)

<0.001

Marital status (Reference: Married)

Single

1.47 (1.44-1.51)

<0.001

Widowed or divorced

1.84 (1.78-1.90)

<0.001

Education (Reference: University

or higher)

High school

1.36 (1.32-1.39)

<0.001

Middle school

1.81 (1.75-1.87)

<0.001

Primary school or less

1.44 (1.38-1.51)

<0.001

Income (Reference: High)

Medium

1.30 (1.27-1.32)

<0.001

Low

1.78 (1.73-1.83)

<0.001

Work status (Rerference: Works)

Does not work

0.74 (0.73-0.76)

<0.001

Region (Reference: North)

Centre

1.21 (1.19-1.24)

<0.001

South

1.10 (1.07-1.12)

<0.001

Physical activity (Reference: Active)

Partially active

0.95 (0.93-0.97)

<0.001

Sedentary

1.15 (1.12-1.18)

<0.001

Alcohol consumption (Reference:

High risk drinker)

Low risk drinker

0.69 (0.64-0.75)

<0.001

Non-drinker

0.47 (0.43-0.52)

<0.001

s(time):High risk drinker

-

0.353

s(time):Low risk drinker

-

0.232

s(time):Do not drink

-

0.038

Depression (Reference:

Not depressed)

Depressed

1.43 (1.39-1.48)

<0.001