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Note that if the sub-questions have varying response domains (for example the code list is not the same across the sub-questions, or they cannot be entered as a grid) it is often best practice to use multiple question items. This is regardless of how many sub-questions/statements there are or how long the question items will be. The exception to this is 'breaking off' questions with a mixed response (usually code list plus a text answer) from a group of sub-questions. The sub-questions without a mixed response can be input as a grid. The mixed response sub-questions are added as separate questions below the grid. See break-off questions for more details.
Example 1 Questionnaire: My Teenage Son 2004 (ALSPAC) question A4. d
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