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Table 1 Descriptive checklist

From: The natural course of low back pain: a systematic critical literature review

Reference number Istauthor Year Country Type of population (Age range) Specific inclusion criteria in relation to LBP Method of data collection Definition of relevant LBP outcome variable (Anatomical site, recall periods, duration, severity, consequence) Years or time of surveys Numbers of surveys over the study period/years
[8] Smedley 1998 UK University hospital-based nurses, all types (19–64 years) NA Qaire LBP > 1 day in the past month 1993 8/2
       Every 3 month Until 1995  
[9] Hestbaek 2003 Denmark Men and women living in a Danish municipality (30–50 years) NA Qaire Number of days with LBP in the past year (0; 1–7; 8–30; >30) days 1991 3/5
       1992  
       1995  
[10] Maül 2003 Germany University hospital-based nurses (?) NA Qaire Number of days with LBP past year (0; 1–7; ≥8)* days 1991 3/9
       1992  
       1999  
[11] Kääriä 2006 Finland The employees in factories, all types (at least 47 yrs) NA Qaire LBP in the past year 1973 4/28
       1978  
       1983  
       2000  
[12] Tamcan 2010 Switzerland General population (?) Those who report LBP in 2002–03 and who still report LBP in 2005 Internet-based diaries or postal diaries LBP past month at week 1 and week 53 2005 53/1
      Intensity of pain each week between Every week  
[13] Kolb 2011 Switzerland General population (?) NA Computer assisted telephonic interviews In past year >1 month of bad BP or LBP 1999 5/5
       2000  
       2001  
       2002  
       2003  
[14] Van Oostrom 2011 The Netherlands General population (20–60) NA Qaire Persistent LBP past year 1993-97 3/10
      Defined as more than three months (study 1 and 3) and more than one month (study 2) 1998-02  
       2003-07  
[15] Videman 2005 Finlande Nursing students NA Qaire BP past 4 month, past year and past 4 years Baseline 9/7.5
      (0; 1–7; 8–30; >30) daysbut not daily, and daily Every 4 month during 2 years  
       1 year after school  
       5 year after school  
  1. *Mentionned in methods. Reclassified from ‘severity’ to duration.
  2. NA: Not applicable.