Table 1.
Description of the National Diet and Nutrition Survey children and adult sample in 2008–2014.
| Children (N = 4636) | Adults (N = 4738) | ||||
|---|---|---|---|---|---|
| % N a | 95% CI | % N a | 95% CI | ||
| Gender | Male | 51 | (49, 53) | 49 | (47, 50) |
| Female | 49 | (47, 51) | 51 | (50, 53) | |
| Age group | 1–5 years | 27 | (25, 28) | ||
| 6–10 years | 27 | (25, 28) | |||
| 11–18 years | 47 | (45, 49) | |||
| 19–64 years | 79 | (77, 80) | |||
| >65 years | 21 | (20, 23) | |||
| Occupation b | Managerial & professional occupations | 43 | (40, 45) | 44 | (42, 46) |
| Intermediate occupations | 20 | (19, 22) | 21 | (19, 22) | |
| Routine & manual occupations | 37 | (35, 39) | 34 | (32, 36) | |
| Household income c (£) | <23,000 | 57 | (54, 59) | 46 | (44, 48) |
| ≥23,000 | 43 | (41, 46) | 54 | (52, 56) | |
| Survey year | 2008–2010 | 38 | (34, 42) | 37 | (33, 41) |
| 2011–2012 | 35 | (32, 39) | 36 | (32, 40) | |
| 2013–2014 | 27 | (24, 31) | 27 | (24, 31) | |
| BMI d | Normal weight | 76 | (74, 77) | 37 | (35, 39) |
| Overweight | 17 | (16, 19) | 37 | (35, 39) | |
| Obese | 7 | (6, 8) | 27 | (25, 29) | |
| Media time e | ≤3 h/day | 47 | (44, 49) | ||
| >3 h/day | 53 | (51, 56) | |||
| Computer time e | ≤1 h/day | 40 | (38, 43) | ||
| >1 h/day | 60 | (58, 62) | |||
| MVPA f | ≤36 min/day | 46 | (43, 48) | ||
| >36 min/day | 54 | (52, 57) | |||
| Misreporting of energy intake | Under-reporters | 9 | (8, 10) | 19 | (17, 20) |
| Plausible reporters | 79 | (77, 80) | 71 | (70, 73) | |
| Over reporters | 12 | (11, 13) | 10 | (9, 11) | |
Abbreviations: BMI–Body Mass Index, CI–Confidence Interval, MVPA–Moderate to Vigorous Physical Activity. a Percentages are weighed based on non-selection and non-response survey weights provided by NDNS; b Occupation is based on the National Statistics Socio-economic Class (NS-SEC). There was 2% missing data in children and 2% missing data in adults; c There was 11% and 14% missing data for household income in children and adults respectively; d BMI categories are based on international (IOTF) BMI cut-offs [19]. For children, BMI z-score were created by standardising BMI for sex and age based on the 1990 British Growth Reference (UK90) [20]). For adults, BMI is measured in kg/m2 and standard WHO cut-offs used to define weight status. There was 9% and 7% missing data in children and adults respectively; e There was 27% missing data in adults; f There was 20% missing data adults.