====Diet and Nutrition== Detailed information on dietary intake has been collected five times: once in [[childhooddiet|childhood]] and four times in adulthood. The childhood diet at 4 years ([[questionnaires:1950|1950]]) was collected via a 24-hour maternal recall of all meals consumed. (Prynne et al, 1999).{{mrepo:food-group.jpg|food groups in the 1950 diet diary}} \\ At the adult ages, all food and drink consumed both at home and away was recorded in diet diaries using household measures and estimating portion sizes according to detailed guidance notes and photographs provided at the beginning of the diary. \\ In [[questionnaires:1982|1982]] and [[questionnaires:1989|1989]], the NSHD used a seven-day diet diary (two-day recall and five-day food diary) and in [[questionnaires:1999|1999]] and [[questionnaires:2009|2006-10]] a five-day diary was used (with no two-day recall). The diaries divided each day into six [[questionnaires:1982|(1982)]] or seven [[questionnaires:1989|(1989]] and [[questionnaires:1999|1999)]] meal slots, plus an “extras” column for items that had not been recorded in the meals. In [[questionnaires:1982|1982]] and [[questionnaires:1989|1989]] the nurse gave detailed instructions on how to complete the diary, filling in the first two days with a 48-hour diet recall and leaving the study members to complete the remaining five days and return by post. In [[questionnaires:1999|1999]], there was no 48-hour recall and the diary was completed by the study members after the interview. \\
Responding sample for the diet diaries
Year | Response |
---|---|
1950 | 4,599 cohort members returned usable dietary information |
1982 | 2,441 returned diaries, of which 2,428 continued after 48 hour recall |
1989 | 3,187 returned diaries, of which 2,280 continued after 48 hour recall |
1999 | 1,776 returned diaries (there was no 48 hour recall) |
2006-10 | 1,869 returned diaries (there was no 48 hour recall) |