Estimated effect of the intervention on HbA1c, weight and waist circumference
| Baseline | Postintervention assessment | |||||
| n | Mean (SD) | n | Mean (SD) | Mean diff (95% CI)* | P value | |
| HbA1c (primary outcome) | ||||||
| Control (ITT) | 132 | 5.96 (0.21) | 115 | 6.11 (0.47) | ||
| Intervention (ITT) | 159 | 5.97 (0.21) | 134 | 6.12 (0.40) | 0.015 (−0.074 to 0.104) | 0.74 |
| Attendance | ||||||
| ≥1 session | 73 | 5.95 (0.20) | 69 | 6.04 (0.30) | −0.057 (−0.139 to 0.024) | 0.17 |
| ≥2 sessions | 56 | 5.96 (0.21) | 54 | 6.07 (0.28) | −0.034 (−0.111 to 0.042) | 0.38 |
| ≥3 sessions | 36 | 5.98 (0.22) | 35 | 6.03 (0.28) | −0.077 (−0.152 to −0.002) | 0.04 |
| All 4 sessions | 22 | 5.95 (0.23) | 22 | 6.02 (0.29) | −0.078 (−0.158 to 0.001) | 0.05 |
| Weight (kg) (secondary outcome) | ||||||
| Control (ITT) | 88 | 68.9 (11.5) | 115 | 70.0 (11.0) | ||
| Intervention (ITT) | 101 | 69.8 (11.2) | 134 | 68.8 (10.9) | −0.8 (−1.8 to 0.2) | 0.12 |
| Attendance | ||||||
| ≥1 session | 49 | 69.2 (10.7) | 69 | 68.2 (10.3) | −1.6 (−3.1 to −0.1) | 0.04 |
| ≥2 sessions | 38 | 69.5 (11.2) | 54 | 68.5 (11.0) | −1.7 (−3.5 to 0.1) | 0.07 |
| ≥3 sessions | 26 | 68.8 (10.4) | 35 | 66.9 (9.9) | −1.5 (−3.5 to 0.5) | 0.13 |
| All 4 sessions | 17 | 69.4 (11.5) | 22 | 67.6 (10.0) | −1.6 (−3.3 to 0.1) | 0.07 |
| Waist circumference (cm) (secondary outcome) | ||||||
| Control (ITT) | 132 | 97.3 (8.3) | 115 | 93.5 (8.8) | ||
| Intervention (ITT) | 159 | 96.5 (8.2) | 134 | 92.5 (9.6) | 0.1 (−1.7 to 1.8) | 0.90 |
| Attendance | ||||||
| ≥1 session | 73 | 95.9 (6.4) | 69 | 92.4 (9.3) | 0.1 (−1.7 to 1.8) | 0.92 |
| ≥2 sessions | 56 | 96.2 (6.6) | 54 | 92.8 (9.9) | 0.3 (−1.7 to 2.1) | 0.84 |
| ≥3 sessions | 36 | 95.0 (6.8) | 35 | 91.8 (9.7) | 0.1 (−1.9 to 2.1) | 0.92 |
| All 4 sessions | 22 | 94.5 (7.3) | 22 | 92.0 (11.3) | 0.7 (−2.0 to 3.5) | 0.60 |
*Mean difference between groups estimated by mixed linear model.
HbA1c, glycated haemoglobin; ITT, intention-to-treat analysis.