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Table 8 Comparison of CHILD study recruits, by recruitment method, versus a reference population

From: You are how you recruit: a cohort and randomized controlled trial of recruitment strategies

 

Reference population

Recruits

   

Total

Fax

In-clinic

   

n = 836

n = 308

n = 399

Married or common law**

93.5%

94.56%

97.7%*

93.4%

(1895/2026)

(747/790)

(255/261)

(353/378)

Attended university (yes/no)

52.0%

90.9%*

92.6%*

89.8%*

(1049/2018)

(566/623)

(176/190)

(281/32)

Current daily or occasionally cigarette smoking

18.6%

5.0%*

6.8%*

4.2%*

(379/2041)

(31/617)

(13/177)

(13/294)

Ethnic or racial group

Caucasian**

77.5%

82.3%*

85.9%*

78.2%

(1531/1986)

(538/654)

(195/227)

(240/307)

Asian

9.2%

8.9%

6.7%

11.4%

(182/1986)

(55/621)

(13/194)

(35/307)

East Indian

3.1%

0.8%*

1.3%

0.3%*

(62/1986)

(5/654)

(3/227)

(1/307)

Black

1.7%

3.2%*

1.8%

3.9%*

(33/1986)

(21/654)

(4/227)

(12/307)

First Nations

3.7%

6.1%*

3.5%

6.8%*

(71/1986)

(40/654)

(8/227)

(21/307)

Household income quartiles

Less than $12,000

9.7%

2.6%

0.9%

3.2%

Less than $19 999

(176/1816)

(16/610)

(2/211)

(9/285)

Top: reference cut off

$12,000 to $24,999

15.9%

5.1%

3.3%

8.1%

$20,000 to $39,999

(288/1816)

(31/610)

(7/211)

(23/285)

$25,000 to $49,999

32.5%

10.7%

11.8%

10.9%

$40,000 to $59,999

590/1816

65/610

25/211

31/285

Bottom/italicized: CHILD cut off

$50,000 or more**

42%

81.6%*

83.9%*

77.9%

$60,000 or more

(762/1816)

(498/610)

(177/211)

(222/285)

Medical conditions

High blood pressure

3.6%

1.4%*

0.4%

2.3%

  

(73/2014)

(9/655)

(1/228)

(7/307)

 

High cholesterol

3.6%

2.0%

1.8%

2.6%

  

(73/2016)

(13/655)

(4/224)

(8/307)

 

Diabetes

2.3%

2.6%

3.1%

3.3%

  

(46/2013)

(17/655)

(7/221)

(10/307)

 

Kidney disease

1.0%

0.9%

0.9%

1.0%

  

(20/2013)

(6/654)

(2/226)

(3/307)

 

Heart disease

0.7%

0%*

0%

0%

  

(14/2012)

(0/639)

(0/229)

(0/307)

  1. *p < 0.05 compared to reference population.
  2. **p < 0.05 between fax and in-clinic recruits.