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Table 4 Participant characteristics by arm

From: A cluster RCT and process evaluation of an implementation optimisation intervention to promote parental engagement enrolment and attendance in a childhood obesity prevention programme: results of the Optimising Family Engagement in HENRY (OFTEN) trial

  Pre-randomisation Follow-up
  Centres subsequently allocated to HENRY alone (n = 438) Centres subsequently allocated to HENRY + optimisation intervention (n = 443) Total (n = 881) Centres delivering HENRY alone (n = 213) Centres delivering HENRY + optimisation intervention (n = 220) Total (n = 433)
Parent gender
 Male 13 (3.0%) 9 (2.0%) 22 (2.5%) 8 (3.8%) 3 (1.4%) 11 (2.5%)
 Female 219 (50.0%) 215 (48.5%) 434 (49.3%) 120 (56.3%) 112 (50.9%) 232 (53.6%)
 Prefer not to say 4 (0.9%) 4 (0.9%) 8 (0.9%) 0 (0.0%) 2 (0.9%) 2 (0.5%)
 Missing 202 (46.1%) 215 (48.5%) 417 (47.3%) 85 (39.9%) 103 (46.8%) 188 (43.4%)
Parent age
 18 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%)
 18–25 yrs 46 (10.5%) 36 (8.1%) 82 (9.3%) 20 (9.4%) 16 (7.3%) 36 (8.3%)
 25–64 yrs 185 (42.2%) 185 (41.8%) 370 (42.0%) 107 (50.2%) 99 (45.0%) 206 (47.6%)
 65 yrs+ 2 (0.5%) 2 (0.5%) 4 (0.5%) 0 (0.0%) 1 (0.5%) 1 (0.2%)
 Prefer not to say 3 (0.7%) 5 (1.1%) 8 (0.9%) 1 (0.5%) 1 (0.5%) 2 (0.5%)
 Missing 202 (46.1%) 215 (48.5%) 417 (47.3%) 85 (39.9%) 103 (46.8%) 188 (43.4%)
Number of childrena n = 232 n = 282 n = 514 n = 183 n = 169 n = 352
 < 1 yrsa 65 (28.0%) 68 (24.1%) 133 (25.9%) 43 (23.5%) 34 (20.1%) 77 (21.9%)
 1 yrsa 59 (25.4%) 71 (25.2%) 130 (25.3%) 41 (22.4%) 38 (22.5%) 79 (22.4%)
 2 yrsa 34 (14.7%) 43 (15.2%) 77 (15.0%) 29 (15.8%) 31 (18.3%) 60 (17.0%)
 3 yrsa 34 (14.7%) 36 (12.8%) 70 (13.6%) 28 (15.3%) 29 (17.2%) 57 (16.2%)
 4 yrsa 27 (11.6%) 38 (13.5%) 65 (12.6%) 25 (13.7%) 15 (8.9%) 40 (11.4%)
 5 yrsa 13 (5.6%) 26 (9.2%) 39 (7.6%) 17 (9.3%) 22 (13.0%) 39 (11.1%)
Ethnicity
 African 7 (1.6%) 15 (3.4%) 22 (2.5%) 8 (3.8%) 5 (2.3%) 13 (3.0%)
 Arab 1 (0.2%) 0 (0.0%) 1 (0.1%) 0 (0.0%) 2 (0.9%) 2 (0.5%)
 Bangladeshi 2 (0.5%) 9 (2.0%) 11 (1.2%) 2 (0.9%) 3 (1.4%) 5 (1.2%)
 Black UK 5 (1.1%) 1 (0.2%) 6 (0.7%) 1 (0.5%) 1 (0.5%) 2 (0.5%)
 Caribbean 1 (0.2%) 6 (1.4%) 7 (0.8%) 2 (0.9%) 2 (0.9%) 4 (0.9%)
 Chinese 1 (0.2%) 2 (0.5%) 3 (0.3%) 2 (0.9%) 0 (0.0%) 2 (0.5%)
 English/Scottish/Welsh/Northern Irish/UK 181 (41.3%) 146 (33.0%) 327 (37.1%) 75 (35.2%) 61 (27.7%) 136 (31.4%)
 Gypsy or Irish traveller 0 (0.0%) 1 (0.2%) 1 (0.1%) 0 (0.0%) 0 (0.0%) 0 (0.0%)
 Indian 6 (1.4%) 4 (0.9%) 10 (1.1%) 4 (1.9%) 1 (0.5%) 5 (1.2%)
 Irish 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 1 (0.5%) 1 (0.2%)
 Mixed ethnic background 2 (0.5%) 2 (0.5%) 4 (0.5%) 7 (3.3%) 2 (0.9%) 9 (2.1%)
 Pakistani 3 (0.7%) 12 (2.7%) 15 (1.7%) 5 (2.3%) 11 (5.0%) 16 (3.7%)
 Any other Asian background 5 (1.1%) 1 (0.2%) 6 (0.7%) 3 (1.4%) 1 (0.5%) 4 (0.9%)
 Any other Black/African/Caribbean background 1 (0.2%) 1 (0.2%) 2 (0.2%) 2 (0.9%) 2 (0.9%) 4 (0.9%)
 Any other White background 13 (3.0%) 13 (2.9%) 26 (3.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%)
 Any other ethnic group 3 (0.7%) 3 (0.7%) 6 (0.7%) 0 (0.0%) 9 (4.1%) 9 (2.1%)
 Prefer not to say 5 (1.1%) 12 (2.7%) 17 (1.9%) 7 (3.3%) 5 (2.3%) 12 (2.8%)
 Missing 202 (46.1%) 215 (48.5%) 417 (47.3%) 95 (44.6%) 114 (51.8%) 209 (48.3%)
How did parents hear about the HENRY programme?
 Family and friends 10 (2.3%) 4 (0.9%) 14 (1.6%) 9 (4.2%) 5 (2.3%) 14 (3.2%)
 Leaflet 10 (2.3%) 15 (3.4%) 25 (2.8%) 14 (6.6%) 10 (4.5%) 24 (5.5%)
 Poster 5 (1.1%) 2 (0.5%) 7 (0.8%) 7 (3.3%) 2 (0.9%) 9 (2.1%)
 Professional 63 (14.4%) 46 (10.4%) 109 (12.4%) 89 (41.8%) 74 (33.6%) 163 (37.6%)
 Website 2 (0.5%) 1 (0.2%) 3 (0.3%) 1 (0.5%) 0 (0.0%) 1 (0.2%)
 Other 10 (2.3%) 18 (4.1%) 28 (3.2%) 8 (3.8%) 15 (6.8%) 23 (5.3%)
 Missing 338 (77.2%) 357 (80.6%) 695 (78.9%) 85 (39.9%) 114 (51.8%) 199 (46.0%)
  1. aCollected as the number of children of each age per parent, numbers reported therefore total more than the number of parents pre-randomisation/follow-up
  2. bRoutine data were missing for 417 parents pre-randomisation and 188 parents at follow-up