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Table 1 Study characteristics across six population-based cohort studies in Germany 1997-2006

From: Educational level, prevalence of hysterectomy, and age at amenorrhoea: a cross-sectional analysis of 9536 women from six population-based cohort studies in Germany

  West Germany East Germany
  KORA-S4 study KORA-F3 study HNR study DHS study CARLA study SHIP-0 study
Study region Augsburg Augsburg Essen, Mülheim, Bochum Dortmund Halle (Saale) West Pomerania
Inhabitants per km2 of the regions 107 107 2,571 2,107 1,756 52
Federal State of Germany Bavaria Bavaria North Rhine-Westphalia North Rhine-Westphalia Saxony-Anhalt Mecklenburg-West Vorpomerania
Population-based hysterectomy rate (per 100,000)1 347 347 369 369 382 436
Recruitment period 1999-2001 2004-2005 2000-2003 2003-2004 2002-2006 1997-2001
Baseline response (%) 66.8 76 55.8 66.9 64.1 68.8
Participating women (N) 2,171 1,639 2,038 694 810 2,184
Age range (years) 25-74 35-84 45-75 25-74 45-83 20-81
Highest school degree (%)2       
Low 53.3 59.1 64.1 50.4 32.0 37.4
Middle 27.6 26.6 20.0 22.2 51.9 47.8
High 18.9 13.9 15.7 26.4 16.1 14.4
Missing 0.2 0.4 0.2 1.0 0.1 0.4
Highest professional degree (%)2       
Low 19.6 21.3 18.7 18.6 10.6 8.8
Middle 69.3 69.5 70.6 63.0 76.3 75.8
High 11.2 8.8 10.5 15.3 7.2 12.9
Missing3 0.2 0.4 0.3 3.2 5.9 2.5
Educational qualification (two-dimensional score)       
1 (=lowest) 0.0 0.0 1.6 2.3 1.7 0.9
2 15.4 16.2 14.7 12.7 5.3 7.2
3 36.2 43.5 47.4 37.3 23.5 26.5
4 21.6 19.2 17.8 19.9 39.5 32.1
5 7.6 6.6 1.9 0.9 8.3 14.8
6 7.8 5.2 5.9 10.7 8.6 3.4
7 11.2 8.8 2.8 0.4 2.0 4.3
8 (=highest) 4 0.0 0.0 7.7 15.3 5.3 8.6
Missing 0.2 0.4 0.3 0.6 5.8 2.2
Median (P10; P90) 3 (2; 7) 3 (2; 6) 3 (2; 7) 3 (2; 7.5) 4 (3; 6) 4 (3; 7)
  1. 1) Age-standardised hysterectomy rates per 100,000 women per year in the Federal States for any indication according to the national hospitalisation file; age standard: female population in Germany at December 31, 2005; for details see [5]; 2) for details, see method section; 3) Higher proportion of missing data due to women who currently undergoing professional re-orientation; 4) DHS study did not distinguish between professional degrees from universities and applied universities; these women (n = 106) were assigned a score of 8; P10: 10th percentile; P90: 90th percentile.