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Table 2 Baseline characteristics of participants recruited using active vs passive methods

From: Evaluation of recruitment methods for a trial targeting childhood obesity: Families for Health randomised controlled trial

Baseline characteristic Active recruitment Passive recruitment p value of difference
Number of families 43 (37.4 %) 72 (62.6 %) 0.007
Number of parents/carers 52 (38.0 %) 85 (62.0 %) 0.005
Number of children 46 (35.9 %) 82 (64.1 %) 0.002
Gender of children    0.616
 Boys 24 (52.2 %) 39 (47.6 %)  
 Girls 22 (47.8 %) 43 (52.4 %)  
Mean age of child (years) (SD) 9.91 (1.61) 9.18 (1.52) 0.012
Mean age of parent/carer (years) (SD) 39.59 (7.19) 40.46 (7.86) 0.517
Family typea    0.162
 Two-parent family 20 (46.5 %) 40 (55.6 %)  
 Single parent (mother) 22 (51.2 %) 24 (33.3 %)  
 Single parent (father) 0 (0 %) 0 (0 %)  
 Step-family 1 (2.3 %) 6 (8.3 %)  
 Other (e.g. living with other relative) 0 (0 %) 2 (2.8 %)  
Child ethnicitya    0.002
 White 24 (52.2 %) 55 (67.1 %)  
 Black 0 (0 %) 10 (12.2 %)  
 Asian 13 (28.3 %) 9 (11.0 %)  
 Chinese 0 (0 %) 0 (0 %)  
 Mixed 9 (19.5 %) 7 (8.5 %)  
 Other 0 (0 %) 1 (1.2 %)  
Baseline mean (SD) BMI of child 27.02 (4.56) 25.21 (4.13) 0.024
Baseline BMI z-score (SD) of child 2.80 (0.85) 2.66 (0.81) 0.273
Baseline mean (SD) BMI of parent/carer 30.19 (5.93) 33.01 (8.51) 0.026
Socio-economic status n (%)    0.361
 Class 1 (higher managerial, administrative and professional occupations) 14 (32.5 %) 25 (34.7 %)  
 Class 2 (intermediate occupations) 9 (20.9 %) 10 (13.9 %)  
 Class 3 (routine and manual occupations) 10 (23.3 %) 26 (36.1 %)  
 Class 4 (never worked) 10 (23.3 %) 11 (15.3 %)  
Families for Health Attendance (n = 56)    
 DNAa 3 (16.7 %) 11 (29.0 %) 0.169
 Attended at least one sessiona 15 (83.3 %) 27 (71.0 %) 0.169
 Completed (at least half) 12 (66.7 %) 23 (60.5 %) 0.658
 Completed (all sessions available)a 3 (16.67 %) 8 (21.1 %) 0.268
Usual care attendance (n = 59)b    
 DNA 13 (61.9 %) 15 (48.4 %) 0.337
 Attended at least one session 8 (38.1 %) 16 (51.6 %) 0.336
  1. DNA did not attend
  2. aFisher’s exact test was used to compare active vs passive recruitment instead of chi-squared test
  3. bSeven missing values for usual care attendance information