Table 1

Participant characteristics at each stage in the program between June 2016 and December 2018

ReferredReferred and attended an IAAttended at least one group-based IVAssociated with cohorts that finished the programCompleted the program*χ2P value
n%n%n%n%n%Reached IA vs. referredAttended at least one IV vs. reached IACompleted vs. finished
Overall324,699100152,29410096,44210032,66510017,252100NANANA
Sex
 Male147,8904668,7804543,5174514,487447,70045<0.001<0.0010.52
 Female172,2525382,6375452,5115418,017559,46555
 Indeterminate/unknown4,5571877141401610870
Age band (years)
 <4017,79755,81842,781383232281<0.001<0.001<0.001
 40–4415,81155,59342,841390333012
 45–4922,60478,44964,60251,46945253
 50–5432,0211012,73587,25682,38879676
 55–5937,9381216,6471110,016103,383101,65510
 60–6440,8801319,6561312,743134,247132,30513
 65–6946,7871425,4811717,517186,205193,71022
 70–7448,1061526,6161718,229196,244193,68421
 ≥7562,6411931,2812120,457216,994213,87722
 Unknown1140180000000
 Mean age6264656567
  SD13.412.411.711.510.2
Ethnicity
 AsianNANA17,3641110,249113,381101,3828NA<0.001<0.001
 BlackNANA9,56765,40262,09969596
 MixedNANA2,53921,673255922491
 OtherNANA1,432176512201820
 WhiteNANA105,3156969,4777223,1137113,00675
 UnknownNANA16,077118,87693,293101,5749
Deprivation quintile
 IMD 1 (most deprived)68,6162129,3881916,357175,634172,50014<0.001<0.001<0.001
 IMD 265,4692029,6041917,472186,368193,22219
 IMD 362,7331930,1412019,378207,038223,86522
 IMD 461,7981930,4462020,300216,747213,72522
 IMD 5 (least deprived)65,1082032,2472122,721246,779213,88823
 Unknown975046802140990520
BMI grouping at IA
 Underweight/healthyNANA22,9531514,033144,373132,55814NA<0.001<0.001
 OverweightNANA50,8503332,6403410,393325,93834
 ObeseNANA67,3904443,3704513,516416,80939
 UnknownNANA11,10176,39974,383131,94711
 Mean (kg/m2)NANA30.330.330.329.9
  SDNANA6.16.05.95.7
Weight at IA (kg)
 MeanNANA83.984.083.682.6
  SDNANA19.118.918.718.1
  • IA, initial assessment; IMD, Index of Multiple Deprivation; IV, intervention session; NA, not available.

  • * Finished and attended >60% of sessions.

  • Indeterminate and unknown grouped together because of suppression of small numbers.