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Table 2 Prevalence estimates and standardized distances to the reference population for external covariates

From: Moving towards a single-frame cell phone design in random digit dialing surveys: considerations from a French general population health survey

 

Reference population

(%)

Dual-frame: combined

(d*)

Single-frame: cell phone

(d*)

Sample size

 

25,319

15,602

Professional status (Labor Survey) (1)

 

8.0

7.8

 Employed

58.7%

−6.1

−4.3

 Student

5.0%

9.2

8.0

 Unemployed

6.2%

11.6

12.0

 Retired/inactive

30.2%

−5.3

−6.9

Socio-professional group (Labor Survey) (2)

 

2.9

2.8

 Farmer

1.7%

0.8

0.8

 Craftsperson, tradesperson, business owner

6.3%

0.0

2.4

 Executive

17.2%

−7.1

−6.3

 Intermediate occupations

25.1%

−1.9

−1.9

 Technicians

27.9%

3.1

2.7

 Blue-collar worker

21.8%

4.5

3.1

Visit to a family physician in the last year (Health Insurance) (3)

 

6.6

8.2

 Yes

85.5%

−6.6

−8.2

 No

14.5%

6.6

8.2

Mean D (1) (2) (3)

5.8

6.3

  1. Boldface entries correspond to results summed up at the variable level or to global distribution of the sample (mean D, R-indicator)