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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.