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Table 1 Basic description of clinical courses by models

From: The clinical back pain courses described by information available in Danish central registries

  

Total

2011–2013

2014–2015

2016–2017

Model I:

Number

64,757

25,196

19,355

20,206

At least six months between courses

Number of patients started # course during study period

    

first

55,441 (85.6%)

23,638 (93.8%)

16,077 (83.1%)

15,726 (77.8%)

second

7842 (12.1%)

1492 (5.9%)

2780 (14.4%)

3570 (17.7%)

third or more

1474 (2.3%)

66 (0.3%)

498 (2.5%)

910 (4.5%)

Days of clinical course

    

Median (25%;75%)

48 (8;113)

60 (15; 132)

43 (1; 107)

39 (1; 95)

Days between clinical course

    

Median (25%;75%)

525 (308; 926)

324 (253; 489)

482 (301; 790)

728 (386; 1232)

Model II:

Number

60,914

23,763

18,085

19,066

At least one year between courses

Number of patients started # course during study period

    

first

55,031 (82.5%)

23,194 (97.6%)

16,101 (89.0%)

15,736 (82.5%)

second

5433 (8.9%)

568 (2.3%)

1900 (10.5%)

2965 (15.6%)

third or more

442 (0.7%)

 

84 (0.5%)

357 (1.9%)

Days of clinical course

    

Median (25%;75%)

55 (13;143)

70 (22; 164)

49 (8; 134)

43 (3; 121)

Days between clinical course

    

Median (25%;75%)

760 (526; 1139)

525 (434; 645)

681 (493; 953)

931 (602; 1381)

Model III:

Number

60,173

22,790

16,810

17,728

At least two years between courses

Number of patients

started # course during study period

    

first

57,338 (95.1%)

22,718 (99.7%)

16,027 (95.3%)

15,758 (88.8%)

second or more

2835 (4.9%)

72 (0.3%)

783 (4.7%)

1970 (11.2%)

Days of clinical course

    

Median (25%;75%)

64 (18;211)

83 (28; 258)

58 (14; 203)

49 (8; 163)

Days between clinical course

    

Median (25%;75%)

1108 (897; 1440)

812 (764; 895)

1009 (855; 1177)

1212 (958; 1548)