Table 1b. Study characteristics.
| Study | Publication | Dataset | No. of cases | Mean age | Sex distribution (M) | Observation period | Minimum duration of continuous DMP participation before beginning of analysis | Adjustment for selection bias (method: variables used) | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| DMP | CG | DMP | CG | DMP | CG | ||||||
| 7 | (29) | AOK patient survey: ELSID study random sample (Rhineland– Palatinate, Saxony–Anhalt) |
865 | 534 | 70.2 ± .3 | 70.5 ± 8.9 | 46.2% | 46.6% | November 2006 | 1 day*6 | Covariance analysis: age, BMI |
| (30) | Covariance analysis: age, sex, number of other chronic diseases, DMP participation | ||||||||||
| (31) | Covariance analysis: age, sex, number of other chronic diseases, DMP participation | ||||||||||
| (32) | None | ||||||||||
| 8 | (33) | GEK patientsurvey: random sample (nationwide) |
444 B 351 F | 494 B 345 F | 63.8 ± 8.5 B | 63 ± 10.1 B | 61.9% B | 61.1% B | B: no information F: after 10.4 months(± 0.64 months) | 6 months before survey (B)*7 | Regression analysis: age, sex, education, knowledge of German, length of time with ‧diabetes, signs of depression, duration of DMP participation |
| 9 | (34) | KORA patient questionnaire: follow-up (Augsburg region) |
89 | 77 | 67.5 ± 8.2 | 68.6 ± 9.9 | 55.1% | 55.8% | B: 1999 to 2001 F: October 2006 to May 2008 | 1 day *8,5 | Regression analysis: age, sex, education, length of time with diabetes, waist circumference, ‧clustering of care (by primary care physician) |
| (35) | 85 | 64 | 67.5 (43 to 79) | 68.5 (36 to 81) | 52.9% | 54.7% | Regression analysis: age, sex, education, length of time with diabetes, serious or moderate ‧associated diseases or complications | ||||
Abbreviations and notes: CG: Control group; B, Baseline; F: Follow-up; M: Male; AOK: Allgemeine Ortskrankenkasse; GEK: Gmünder Ersatzkasse; KORA: Kooperative Gesundheitsforschung in der Region Augsburg; ELSID: Evaluation of Large Scale ?Implementation of Disease Management Programs for Patients with Type 2 Diabetes
*5Unclear whether DMP participants must be enrolled throughout the observation period
*6Mean DMP participation according to the authors (22): male 27.2 months, female 26.6 months
*7DMP participation between the two surveys (b and f) not necessary
*8Mean DMP participation according to the authors (34): 27 months