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Table 3 Mean (SD) secondary outcomes at 6 months according to group and ANCOVA results before and after adjusting for season

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

Outcome Intervention Groupa Control Groupa Analysis of covarianceb Analysis of covariancec
n Mean (SD) n Mean (SD) b (95% CI) p-value b (95% CI) p-value
GPAQ: minutes of work PA (minutes/week) 253 16 (58) 235 44 (129) −34 (−65, −2 0.04 −33 (− 65, − 1) 0·04
GPAQ: minutes of MVPA (minutes/week) 231 291·8 (255·8) 221 350·1 (329·4) −2·8 (− 63·4, 57·9) 0·93 4·1 (−47·1, 55·3) 0·88
SF-8: Mental Component Score 269 48·4 (8·9) 244 47·1 (9·4) 1·1 (−0·3, 2·4) 0·12 1·2 (− 0·2, 2·6) 0·10
SF-8: Physical Component Score 269 50·9 (8·4) 244 51·0 (7·6) 0·43 (−1·3, 2·1) 0·62 0·6 (−0·8, 2·1) 0·38
EQ-5D: Health State 262 78·0 (16·2) 239 78·3 (16·1) 0·7 (−2·4, 3·7) 0·66 0·70 (− 2·5, 3·9) 0·66
EQ-5D: Weighted Health Index 262 0·8 (0·1) 239 0·8 (0·2) 0·01 (−0·02, 0·03) 0·71 0·01 (−0·01, 0·04) 0·37
WEMWBS: Mental wellbeing scale 266 50·3 (8·4) 243 49·4 (8·2) 1·2 (0·2, 2·1) 0·02 1·3 (0·5, 2·2) < 0·01
HPQ: Four week absolute absenteeism 247 4·0 (66·1) 227 7·0 (51·4) −2·25 (−12·5, 8·0) 0·67 −2·59 (− 12·8, 7·6) 0·62
HPQ: Absolute presenteeism 261 78·6 (14·6) 236 78·5 (14·2) 0·8 (−1·8, 3·4) 0·54 1·5 (−0·4, 3·4) 0·13
HPQ: Combined relative absenteeism and absolute presenteeism 246 9·5 (24·6) 226 7·9 (4·9) −0·03 (− 0·9, 0·9) 0·95 − 0·02 (− 0·9, 0·9) 0·96
  1. aMonth six outcomes (unadjusted)
  2. bANCOVA comparison of 6 month means in Intervention vs Control Group adjusted for baseline values of the outcome, and randomisation stratum and corrected for clustering
  3. cANCOVA comparison of 6 month means in Intervention vs Control Group adjusted for baseline values of the outcome, randomisation stratum and season and corrected for clustering
  4. ANCOVA Analysis of Covariance, CI confidence interval, EQ-5D EuroQol five dimensions, GPAQ Global Physical Activity Questionnaire, MVPA moderate- to vigorous-intensity physical activity, NHS National Health Service, PA physical activity, SD standard deviation, SE standard error, SF Short Form, WEMWBS Warwick-Edinburgh Mental Wellbeing Scale