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Table 5 Procedures of data collection and entry in the SALT Osteoporosis Study

From: Design of the SALT Osteoporosis Study: a randomised pragmatic trial, to study a primary care screening and treatment program for the prevention of fractures in women aged 65 years or older

Data collection
 Sending of questionnaire by mail
 If no reply: repeated sending of questionnaire
 If no reply: sending of abbreviated questionnaire
 If no reply: follow-up calls by phone
Data entry
 Entry of the data in the database in duplo by different administrators
 If mismatch: checking of data by third person
 If missing data on important questions: follow-up calls by phone
 If reported rheumatoid arthritis or prednisone use (first questionnaire): verification at general practitioner