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Table 1 Participant Characteristics and PA as Mean and Standard Error or Percent by Source of Recruitment

From: A new approach to physical activity maintenance: Rationale, design, and baseline data from the Keep Active Minnesota trial

  Direct Mail Self-Refer All
N 824 225 1049
age at baseline 57.1(.18) 57.2(.34) 57.1(.16)
female 69.5 82.7*** 72.4
BMI, kg/m2 27.6(.19) 27.5(.38) 27.6(.17)
White 94.2 97.3 94.9
Hispanic/Latino 1.9 1.8 1.8
employed full time 76.2 79.1 76.8
4 year degree or more 66.3 68.4 66.7
functional health status fair or poor 7.0 3.1* 6.2
kcal/wk, 4721 4679 4712
total (91) (155) (79)
kcal/wk, 2837 2731 2815
moderate or vigorous (72) (125) (63)
moderate activity 23.5 28.4 24.6
30 minutes, 5/week    
vigorous activity 35.7 36.4 35.8
20 minutes, 3/week    
moderate or vigorous 48.8 55.1 50.1
  1. * self-refer vs. mail, p < .05
  2. *** self-refer vs. mail, p < .001