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Table 2 Characteristics of the nine participating hospitals and number of medical records extracted at each hospital

From: Internal validity of the Swedish Maternal Health Care Register

City

Participating hospital

Level of health care

Inhabitants/km22011a

No. of births 2011b(%)c

No. of medical records (%)d

Göteborg

Sahlgrenska University Hospital

University

66.8

10363 (9.4)

91 (10.4)

Halmstad

Halmstad Hospital

County

55.6

1799 (1.6)

96 (10.9)

Jönköping

Ryhov Hospital

County

32.4

2075 (1.9)

99 (11.3)

Stockholm

Karolinska University Hospital

University

320.5

4642 (4.2)

96 (10.9)

Stockholm

Södersjukhuset

University

320.5

7331 (6.7)

98 (11.2)

Sundsvall

Sundsvall Hospital

Regional

11.2

1536 (1.4)

100 (11.4)

Umeå

Umeå University Hospital

University

4.7

1817 (1.6)

100 (11.4)

Örebro

Örebro University Hospital

University

33.1

2867 (2.6)

99 (11.3)

Östersund

Östersund Hospital

Regional

2.6

1298 (1.2)

99 (11.3)

    

30728 (28.0)

878 (100%)

  1. aPopulation density in catchment area. Data from “Inhabitants per kilometer2” [Internet] Statistics Sweden; 2011 (cited 2013, June 6) http://www.scb.se/Pages/SSD/SSD_SelectVariables340487.aspx?px_tableid = ssd_extern%3aBefArealTathetKon&rxid = ca8cabdd-0d60-488b-b047-4b5c5a89dcb5.
  2. bData from National Board of Health and Welfare’Graviditeter, förlossningar och nyfödda barn. Medicinska Födelseregistret 1973-2011. Assisterad befruktning 1991 – 2010’ [in Swedish] http://www.socialstyrelsen.se/publikationer2013/2013-3-27.
  3. cProportions are calculated by using the total no of births in Sweden 2011 (N = 109 752) as denominator.
  4. dProportions are calculated by using the total no of medical records as denominator.