Package index
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add_to_database() - Adds a single .txt file to an SQLite database on the hard disk.
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combine_query() - Combine a database query with a cohort.
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combine_query(<aurum>) - Combine a CPRD aurum database query with a cohort.
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combine_query_boolean() - Combine a database query with a cohort returning a 0/1 vector depending on whether each individual has a recorded code of interest.
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combine_query_boolean(<aurum>) - Combine a CPRD aurum database query with a cohort returning a 0/1 vector depending on whether each individual has a recorded code of interest.
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connect_database() - Open connection to SQLite database
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cprd_extract() - Adds all the .txt files in a directory, with certain file names, to an SQLite database on the hard disk.
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create_directory_system() - Create the appropriate directory system to be able to run functions without specifying hard filepaths
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db_query() - Query an RSQLite database.
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delete_directory_system() - Deletes directory system created by
delete_directory_system
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extract_bmi() - Extract most recent BMI score relative to an index date.
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extract_cholhdl_ratio() - Extract most recent total cholesterol/high-density lipoprotein ratio score relative to an index date.
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extract_cohort() - Create cohort from patient files
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extract_diabetes() - Extract diabetes status prior to an index date.
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extract_ho() - Extract a 'history of' type variable
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extract_smoking() - Extract smoking status prior to index date.
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extract_test_data() - Extract test data.
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extract_test_data_var() - Extract standard deviation of all test data values over a specified time period relative to an index date.
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extract_test_recent() - Extract test data.
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extract_time_until() - Extract a 'time until' type variable
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extract_txt_char() - Read in txt file with all colClasses = "character"
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extract_txt_cons() - Read in raw .txt consultation file
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extract_txt_death() - Read in raw ONS death data file
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extract_txt_drug() - Read in raw .txt drugissue file
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extract_txt_hes_primary() - Read in raw HES primary diagnoses file
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extract_txt_linkage() - Read in linkage eligibility file
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extract_txt_obs() - Read in raw .txt observation file
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extract_txt_pat() - Read in raw .txt patient file
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extract_txt_prob() - Read in raw .txt problem file
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extract_txt_ref() - Read in raw .txt referral file
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implement_output() - Internal function to implement saving extracted variable to disk or returning into R workspace.