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Table 1 Mean (SD) baseline characteristics of participants according to group

From: Effectiveness and cost-effectiveness of a loyalty scheme for physical activity behaviour change maintenance: results from a cluster randomised controlled trial

  Intervention Group Control Group
Characteristics of clusters N = 19 N = 18
Number of participants; mean (range) 24 (4 to 147) 22 (4 to 81)
Randomisation stratum, clusters (n, % participants)
 Small (< 20 employees) 11 (114, 25%) 11 (105, 27%)
 Medium (20–50 employees) 5 (167, 37%) 4 (123, 31%)
 Large (> 50 employees) 1 (147, 32%) 2 (144, 36%)
 Schools 2 (29, 6%) 1 (24, 6%)
Characteristics of participants n = 457 n = 396
Age (years) 44·0 (9·3) 43·0 (10·0)
Female gender; n (%) 329 (72%) 278 (70%)
BMI (kg/m2) 27·2 (5·6) 26·6 (5·3)
Income >£20 k; n (%) 341 (75%) 291 (73%)
Education some higher level; n (%) 295 (65%) 270 (68%)
Marital status married/co-habiting; n (%) 313 (68%) 274 (69%)
Objective PA: pedometer steps (steps/day) 7977 (3602) 7650 (3204)
Objective: physical activity category, n (%)
 High (> 7500 steps/day) 204 (45%) 167 (42%)
 Moderate (> 2500- ≤ 7500 steps/day) 199 (44%) 184 (46%)
 Low (≤2500 steps/day) 11 (2%) 8 (2%)
GPAQ: minutes of work PA (minutes/week) 42 (138) 58 (151)
GPAQ: minutes of MVPA (minutes/week) 296 (342) 344 (333)
GPAQ: physical activity categorya, n (%)
 High 70 (15%) 76 (19%)
 Moderate 140 (31%) 130 (33%)
 Low 141 (31%) 104 (26%)
SF-8: Mental Component Score 48·0 (8·9) 47·7 (9·3)
SF-8: Physical Component Score 52·5 (6·6) 52·7 (7·0)
EQ-5D: Health State 82·4 (13·8) 83·8 (14·3)
EQ-5D: Weighted Health Index 0·89 (0·11) 0·89 (0·12)
WEMWBS: Mental wellbeing scale 50·2 (8·2) 50·3 (8·9)
Physical Activity Self-Efficacy scale 2·91 (0·97) 2·92 (0·94)
HPQ: Four week absolute absenteeism 5·04 (41·3) 3·48 (50·0)
HPQ: Absolute presenteeism 80·3 (13·6) 81·0 (13·4)
HPQ: Combined relative absenteeism and absolute presenteeism 8·84 (12·57) 8·56 (7·32)
  1. aPhysical activity category was derived based on the standardised scoring protocol for the GPAQ (http://www.who.int/ncds/surveillance/steps/GPAQ%20Instrument%20and%20Analysis%20Guide%20v2.pdf)
  2. EQ-5D EuroQol five dimensions, GPAQ Global Physical Activity Questionnaire, HPQ Health and Work Performance Questionnaire, MVPA Moderate- to vigorous-intensity physical activity, NHS National Health Service, PA Physical activity, SD Standard deviation, SF Short Form, WEMWBS Warwick-Edinburgh Mental Wellbeing Scale
  3. Please see Additional file 4 : Table S1 for further details regarding the outcome measures