Table 6 Statistically significant differences between DMP and usual-care patients when using imputed and available data

Selection bias

1. Systolic BP value: 120 vs. 160 mmHg

(OR: 1.79 [95% CI: 1.15 to 2.81])

1. Systolic BP value: 120 vs. 160 mmHg

(OR: 1.99 [95% CI: 1.09 to 3.63])

2. Oral medication

(OR: 2.17 [95% CI: 1.35 to 3.49])

2. Oral medication

(OR: 2.32 [95% CI: 1.28 to 4.20])

3. Blood glucose self-monitoring

(OR: 1.69 [95% CI: 1.03 to 2.76])

3. Blood glucose self-monitoring

(OR: 3.40 [95% CI: 1.70 to 6.80])

4. Prescription of diabetes patient education

(OR: 2.32 [95% CI: 1.29 to 4.19])

4. Prescription of diabetes patient education

(OR: 2.64 [95% CI: 1.27 to 5.41])

5. GP-rated motivation of the patients: high vs. low (3 vs. 1 on a 3-point scale)

(OR: 4.55 [95% CI: 2.21 to 9.36])

5. GP-rated motivation of the patients: high vs. low (3 vs. 1 on a 3-point scale)

(OR: 6.96 [95% CI: 2.26 to 21.43])

6. Smoking behaviour: non-smoking

(OR: 1.97 [95% CI: 1.11 to 3.48])

6. No difference regarding smoking behaviour

7. No difference regarding urinary glucose self-monitoring

7. Urinary glucose self-monitoring

(OR: 5.68 [95% CI: 1.07 to 30.21])

Outcome quality

1. Course of systolic BP

(-3.57 mmHg [95% CI: -0.98 to -6.15])

1. No differences regarding course of systolic BP