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Table 2 Pre-specified definitions of CDPoRT predictors

From: Chronic Disease Population Risk Tool (CDPoRT): a study protocol for a prediction model that assesses population-based chronic disease incidence

Variable type

Variable

Definition

df

Modifiable lifestyle risk factors

Alcohol consumption

4

 Non-drinker

No alcohol consumption in the last 12 months or drink frequency fewer than once a week

 

 Light drinker

Alcohol consumption frequency at least once a week and 0–2 (females) or 0–3 (males) drinks in the previous week

 Moderate drinker

3–14 (females) or 4–21 (males) drinks in the previous week

 Heavy drinker

≥ 14 (females) or ≥ 21 (males) drinks in the previous week, or binging behavior on a weekly basis (≥ 5 drinks on any occasion)

Cigarette smoking

5

 Non-smoker

Never a smoker or former occasional smoker with < 100 lifetime cigarettes

 

 Heavy smoker

Current smoker [≥ 1 pack (25 cigarettes)/day]

 Light smoker

Current smoker [< 1 pack (25 cigarettes)/day]

 Former heavy

Former smoker [≥ 1 pack (25 cigarettes)/day]

 Former light smoker

Former smoker [< 1 pack (25 cigarettes)/day]

Daily fruit and vegetable consumption

3

 Low consumption

0 to < 3 times daily

 

 Medium consumption

3 to < 6 times daily

 High consumption

≥ 6 times daily

Physical activity quartile

4

 Quartile 1

Bottom 25% physically active

 

 Quartile 2

Bottom 26–50% physically active

 Quartile 3

Bottom 51–75% physically active

 Quartile 4

Top 25% physically active

Sociodemographic characteristics

Age

5

 Continuous

Spline with 4 interior knots

 

Ethnicity

2

 White

  

 Non-White

 

Immigration status

3

 Canadian born

  

 Recent immigrant

Immigrated < 10 years

 Non-recent immigrant

Immigrated ≥ 10 years

Household income

5

 Quintile 1

Lowest 20%

 

 Quintile 2

 

 Quintile 3

 

 Quintile 4

 

 Quintile 5

Highest 20%

Education

3

 Less than secondary school graduation

  

 Secondary school graduation

 

 Post-secondary education (complete and partial)

 

Marital status

3

 Single never married

  

 Domestic partner (married/common law)

 

 Widowed/separated/divorced

 
 

Asthma

2

 Yes

  

 No

 

Body mass index (BMI) (kg/m2)

6

 Underweight

< 18.5 BMI

 

 Normal weight

18.5–24.9 BMI

 Overweight

25.0–29.9 BMI

 Moderately obese (class 1)

30.0–34.9 BMI

 Very obese (class 2)

35.0–39.9 BMI

 Severely obese (class 3)

≥ 40.0 BMI

High blood pressure

2

 Yes

  

 No

 

Household secondhand smoke

2

 Household secondhand smoke

  

 No household secondhand smoke

 

Self-rated health

3

 Excellent/very good

  

 Good

 

 Fair/poor

 

Life stress

4

 Quite a bit/extremely stressful

  

 Not very stressful

 

 A bit stressful

 

 Not at all stressful

 
  1. The degrees of freedom (df) include a category for those who could not be classified (i.e., missing)