{ "title": "College concussion survey: selected variable definitions", "scope": "Questionnaire and preparation excerpt. No participant records or statistical results are included.", "source": "TBI Data Dictionary (filled).xlsx, Sheet1", "source_sha256": "967fc14e2697f369062bd94ff2743ec737932069ac35d8c225d77362839acee7", "variables": [ { "id": "Q15", "source_row": 37, "question": "Did you play competitive sports in high school?", "responses": [ "Yes", "No" ], "recoded_variable": "Q15_R", "recoded_source_row": 189, "source_recoding": { "Yes": 1, "No": 0 } }, { "id": "Q44", "source_row": 78, "question": "Have you ever received any concussion education or training sessions prior to entering college?", "responses": [ "Yes", "No" ], "recoded_variable": "Q44_R", "recoded_source_row": 249, "source_recoding": { "Yes": 1, "No": 0 } }, { "id": "Q48", "source_row": 83, "question": "Imagine you slip and hit your head and afterwards don't feel right and suspect you may have a concussion.\n\nIf you suspected you had a concussion, would you search online for information before seeking professional help?", "responses": [ "Yes", "No" ], "recoded_variable": "Q48_R", "recoded_source_row": 254, "source_recoding": { "Yes": 1, "No": 0 } }, { "id": "Q21", "source_row": 52, "question": "In your lifetime, have you ever sought medical attention for a suspected concussion?", "measures": "Self-reported lifetime care-seeking", "responses": [ "Yes", "No" ] }, { "id": "Q43", "source_row": 77, "question": "How confident are you in your answers about your concussion knowledge? (where 1 is not confident at all and 5 is very confident)", "measures": "Confidence in answers, not an objective knowledge score", "responses": [ 1, 2, 3, 4, 5 ] }, { "id": "Q46", "source_row": 80, "question": "Imagine you slip and hit your head and afterwards don't feel right and suspect you may have a concussion. How soon after hitting your head would you seek healthcare?", "measures": "Intended timing in a hypothetical scenario", "responses": [ "Immediately", "Within a few hours", "The same day", "The next day", "Within the week", "I would not seek healthcare", "Only if problems persisted after a week" ] } ], "scoring_provenance": { "saved_predictor": "Knowledge_Score_Total is described in the saved Sutrix analysis as a 0\u201319 score over Q23\u2013Q41. This is distinct from the original manual Knowledge_Score_Total_R.", "item_ids": [ "Q23", "Q24", "Q25", "Q26", "Q27", "Q28", "Q29", "Q30", "Q31", "Q32", "Q33", "Q34", "Q35", "Q36", "Q37", "Q38", "Q39", "Q40", "Q41" ], "dictionary_rows": "57\u201375", "historical_code_sha256": "b6d4387cec595a19a750a540cb89aaf1c451cafbe8343d2f84730d33451c4cc4", "historical_code_key": { "Q23": "True", "Q24": "False", "Q25": "False", "Q26": "False", "Q27": "True", "Q28": "False", "Q29": "True", "Q30": "False", "Q31": "False", "Q32": "False", "Q33": "True", "Q34": "True", "Q35": "True", "Q36": "True", "Q37": "True", "Q38": "False", "Q39": "True", "Q40": "False", "Q41": "True" }, "aggregation": "Historical operations 189\u2013207 score recognized keyed answers 1 and opposites 0; operation 208 casts integers; operation 209 sums Q23\u2013Q41. Any blank/unparsable item makes the total blank; no prorating. Expected range 0\u201319 assumes valid binary items and was not enforced by the historical code.", "linkage": "The recovered production cleaned artifact and saved repository input match row-for-row on all model/exploration columns and all 19 knowledge items across 348 rows. This does not validate every raw-to-clean operation.", "scope": "Source definitions and saved-predictor metadata do not establish raw-to-clean fidelity.", "current_version": "pdf-key-v2", "current_key": { "Q23": "True", "Q24": "False", "Q25": "False", "Q26": "False", "Q27": "True", "Q28": "False", "Q29": "True", "Q30": "False", "Q31": "True", "Q32": "False", "Q33": "True", "Q34": "True", "Q35": "True", "Q36": "True", "Q37": "False", "Q38": "False", "Q39": "True", "Q40": "False", "Q41": "True" }, "key_source": "Concussion Knowledge Key.pdf, pages 1\u20132", "key_source_sha256": "3d90cfbef8fd7968ffb74608d46c7ef9c7fff02ac88f700082a637ae472c4437", "decision": "Supplied Concussion Knowledge Key.pdf, pages 1\u20132; preferred to historical implementation as explicit intended key. User delegated source selection on 2026-09-10. This is not study-owner endorsement or clinical validation.", "current_aggregation": "Flip Q31/Q37 historical correctness bits (1-x), preserving blanks. Sum Q23\u2013Q41 only when all 19 binary items are present; no prorating. Assert historical total equals complete-item sum before correction." }, "coding_example": { "id": "Q46_R", "source_row": 251, "recorded_mapping": { "Immediately": 1, "Within a few hours": 2, "The same day": 3, "The next day": 4, "Within the week": 5, "Only if problems persisted after a week": 6, "I would not seek healthcare": 0 }, "review_note": "These are category codes, not elapsed time. Never seeking care must not be interpreted as earlier than immediate care. Any grouping or model treatment needs an explicit analysis decision." }, "source_item_audit": { "performed_on": "2026-09-10", "reviewer": "Separate AI agent; read-only source audit, not a human statistician", "raw_input_sha256": "42d410f092bd212bcb50faf0d7c33dd69545b09ac68180f164f49aa4abe602fc", "scope": "One metadata row followed by 348 respondents. All 19 raw knowledge fields contain only True, False or blank. Independently applying recovered historical mapping dictionaries reproduces all 19 saved item fields across every row in order. This validates the two-item binary correction for this frame, not every cleaning operation.", "pdf_key_check": "Visually checked pages 1\u20132. Exactly Q31 and Q37 differ from historical code. Printed frequency totals in the PDF describe a different frame and are not validation of this 348-row sample." } }