ACTI

exercise

daily activity

PAQ180

(paq)

1 – code 1

0 - remainder

category 1 = sedentary in daily activity  and includes 25.65% of subjects^†

AGEY

demographic

age in years

RIDAGEYR

(demo)

0 – age <49

1 – age ≥ 49

basic demographic characteristic  Not used in risk comparisons

Age =>49 includes 49.60% of subjects

ALCO

lifestyle

average number of alcoholic drinks/day

ALQ130

(alco)

1 – ≥3

0 – <3

three or more drinks per day includes 22.41% of subjects

BMIX

diet

body mass index

BMXBMI

(bmx)

1 – ≥33

0 – <33

category 1 includes 20.05% of subjects

CAFF

lifestyle

daily intake of caffeine (mg)

DRXTCAFF

(drxtot)

1 – ≥287.6

0 – <287.6

category 1 includes 20.00% of subjects

CARO

diet

daily intake of carotene (retinol equivalents)

DRXTCARO

(drxtot)

1 - <=61.49

0- >61.49

category 1 includes 19.97% of subjects

CHOL

diet

daily intake of cholesterol (mg)

DRXTCHOL

(drxtot)

1 - => 441.78

0  - <441.78

category 1 includes 20.00% of subjects

EDUC

socec

level of education

DMDEDUC

(demo)

1 – code 1

0 -  codes 2 & 3

category 1 represents the lowest level of education and includes 37.36% of subjects

FIBE

diet

daily intake of dietary fibre (mg)

DRXTFIBE

(drxtot)

1 – <=7.56

0 - >7.56

category 1 includes 20.00% of subjects

GEND

demographic

gender

RIAGENDR

(demo)

0 - women

1 -  men

basic demographic characteristic  Not used in risk comparisons

women comprise 53.27% of subjects

HOU2

socioeconomic

number of rooms in residence

HOD50

(hoq)

1 - <=4

0 - >4

correction for number of people in household would have been desirable but this information was not available

residences with 4 rooms or fewer includes 27.68% of subjects

INCO

socioeconomic

family income (US$)

INDFMINC

(demo)

1 – codes 1 -4, 12

0 – remainder

NHANES scores included in category 1 represent subjects living in families with an income of less than US$20,000 per annum.

category 1 includes 37.77% of subjects

IND2

socioeconomic

industry of employment

OCD230

(ocq)

1 – employment in industry offering potential hazard

0 -  remainder

Subject included in category 1 if they were recorded as working in industries in the following NHANES industry groups

3 – mining

4 – construction

9 – manufacturing: chemicals, petroleum, and coal products

10 – manufacturing: rubber, plastics, and leather products

11 – manufacturing: lumber and wood products, including furniture

12 – manufacturing: metal industries

17 – trucking services

18 – transportation except trucking

25 – retail: vehicle dealers, supply and service stores

category 1 includes 9.63% of subjects

JOB2

socioeconomic

occupation

OCD240

(ocq)

1 – NHANES occupation codes representing manual or unskilled jobs

0 - remainder

Subject included in category 1 if they recorded working in industries with the following NHANES job groups

16 – miscellaneous administrative support occupations

17 – private household occupations

19 – waiters and waitresses

21 – miscellaneous food preparation and service occupations

23 – cleaning and building service occupations

26 –  farm and nursery workers

27 – related agricultural, forestry, and fishing occupations

37 – construction labourers

38 – labourers, except construction

39 – freight, stock, and material movers, hand

40 – other helpers, equipment cleaners, hand packagers, labourers

This brought 12.25% of subjects into code 1.

KCAL

diet

total daily caloric intake (kcal)

DRXTKCAL

(drxtot)

1 –  =>2744.87

0 – =>2744.87

because of strong correlations between daily intakes of principal food groups, caloric intake was chosen to represent total daily food intake

category 1 includes 20.00% of subjects 

MODE

exercise

moderate, voluntary physical exercise

PAD320

(paq)

1 – codes 2 & 3

0 – remainder

this characteristic represents those who did not undertake Any moderate exercise lasting for at least 10 minutes  and which caused light sweating of moderate increases in heart or respiratory rate (eg brisk walking, cycling for pleasure, golf, dancing) in the previous 30 days and includes those subjects who stated that they were unable to do so

category 1 includes 62.39% of subjects

PREP

lifestyle

frequency of eating food prepared outside the home

DBD09

(dbq)

1 – a ≥ 4 times per week

0 – < times per week

Note that in previous use it was recoded with 6666 (< weekly) given a numerical code.  Subject to threshold set, this may or may not be necessary.

category 1 includes 21.69% of subjects

RACE

socioeconomic

ethnicity of subject

RIDRETH1

(demo)

1 – code 4

0 – others

used only in sensitivity analysis

NHANES codes:

1 – Mexican American

2 – other hispanic

3 – non-hispanic white

4 – non-hispanic black

5 – other race, including multi-racial

category 1 includes 17.82% of subjects

SDAI

lifestyle

smokes daily

SMQ020 + SMQ040

(smq)

1 – yes

0 – no

category 1 includes 16.61% of subjects

SFOR

lifestyle

former smoker

SMQ020 + SMQ040

(smq)

1 – yes

0 – no

category 1 includes 26.83% of subjects

SNEV

lifestyle

never smoker

SMQ020 + SMQ040

(smq)

1 – yes

0 – no

category 1 includes 52.94% of subjects

SOCC

lifestyle

smokes less than daily

SMQ020 + SMQ040

(smq)

1 – yes

0 – no

category 1 includes 3.62% of subjects

SOFA

exercise

hours per day spent watching television

PAQ480

(paq)

1 – codes 4 & 5

0 – remainder

lack of physical exercise in considered to be a risk factor for several categories of disease

codes 4 and 5 comprise subjects who spent four or more hours per day watching television or using a computer for entertainment

category 1 includes 25.34% of subjects

VITC

diet

daily intake of vitamin C (mg)

DRXTVC

(dbq)

1 – ≥25.77

0 – <25.77

used only in sensitivity analysis

category 1 includes 20.03% of subjects