Scans a data frame for standard WHO STEPS variable names across versions 3.1 and 3.2. Aliases are listed in priority order: the first match wins, so put the most specific / unambiguous name first.
detect_steps_columns(data)A data frame (typically from import_steps_data()).
A named list of detected column names (or NULL for missing).
WHO STEPS reorganised variable codes between v3.1 and v3.2:
v3.1 / Epi Info codes (still common in many country datasets): B1-B6 = blood-pressure readings, B7 = BP meds, C1 = fasting glucose, C5 = DM meds, C6 = total cholesterol, C10 = chol meds, M1 = height, M2 = weight, M3 = waist.
v3.2 instrument codes: M4a/M5a/M6a = SBP readings, M4b/M5b/M6b = DBP readings, M7 = BP meds, M11 = height, M12 = weight, M14 = waist, M15 = hip, B5 = fasting glucose, B6 = DM meds, B8 = total cholesterol, B9 = chol meds, B16 = triglycerides, B17 = HDL cholesterol, C1 = sex, C3 = age.
The function includes aliases for both versions so datasets from either instrument version are detected automatically.