Table 3.
Median and interquartile range of 24 h urinary iodine concentration (UIC), salt intake and iodine intake, and the number and percentage of adult family members with UIC<100 µg/l and UIC<50 µg/l, according to age group, education level, family socio-economic status (SES), and mothers’ knowledge, attitude and behaviour categories, Tehran, Iran
| 24 h UIC (µg/l) | Salt intake (g/d) | Iodine intake (µg/d) | UIC<100 µg/l | UIC<50 µg/l | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | n | Median | IQR | Median | IQR | Median | IQR | n | % | n | % |
| All adult family members | 290 | 70·0 | 34·0–131·0 | 7·5 | 5·3–10·0 | 129·5 | 25·6–249·5 | 187 | 64·5 | 118 | 40·7 |
| Age (years) | |||||||||||
| 19–24 | 51 | 79·0 | 42·0–146·1 | 6·6* | 4·8–8·3 | 135·0 | 16·1–228·2 | 32 | 62·7 | 18 | 35·3 |
| 25–34 | 53 | 69·0 | 32·0–136·5 | 7·6 | 5·3–10·2 | 134·6 | 25·6–259·0 | 32 | 60·4 | 20 | 37·7 |
| 35–49 | 98 | 77·2 | 38·0–131·0 | 7·3 | 5·4–9·7 | 113·0 | 119·0–224·1 | 59 | 60·2 | 37 | 37·8 |
| ≥50 | 88 | 53·6 | 28·6–103·9 | 8·1 | 5·5–10·6 | 156·4 | 43·6–275·5 | 64 | 72·7 | 43 | 48·9 |
| Education level | |||||||||||
| Illiterate | 9 | 86·0* | 45·0–101·0 | 6·1 | 5·1–10·0 | 154·0* | 75·4–238·5 | 6* | 66·7 | 3* | 33·3 |
| Primary | 86 | 55·6 | 34·0–103·8 | 7·8 | 5·4–11·0 | 41·3 | 12·4–198·8 | 63 | 73·3 | 41 | 47·7 |
| Secondary | 112 | 71·4 | 28·1–135·0 | 7·3 | 5·1–9·4 | 144·7 | 38·6–244·5 | 74 | 66·1 | 46 | 41·1 |
| Higher | 83 | 90·0 | 44·0–155·0 | 7·4 | 5·3–10·2 | 158·0 | 55·0–299·7 | 44 | 53·0 | 28 | 33·7 |
| Family SES | |||||||||||
| High | 123 | 76·5 | 29·6–168·8 | 7·5 | 5·4–10·4 | 177·5 | 99·5–326·5 | 72 | 58·5 | 49 | 39·8 |
| Middle | 105 | 83·5 | 42·5–122·5 | 6·9 | 5·3–9·6 | 106·7 | 13·0–235·8 | 64 | 61·0 | 35 | 33·3 |
| Low | 62 | 45·0* | 27·0–86·0 | 7·7 | 5·0–9·4 | 27·2* | 13·8–134·9 | 51* | 82·3 | 34* | 54·8 |
| Mothers’ knowledge score | |||||||||||
| High | 103 | 71·0 | 33·6–127·0 | 7·1 | 5·2–9·5 | 129·5 | 25·1–261·5 | 68 | 66·0 | 40 | 38·8 |
| Intermediate | 85 | 67·5 | 32·0–131·4 | 7·9 | 5·5–11·0 | 145·9 | 25·2–254·8 | 56 | 65·9 | 37 | 43·5 |
| Low | 100 | 73·8 | 35·5–127·0 | 6·7 | 5·1–9·7 | 101·0 | 26·7–219·8 | 63 | 63·0 | 41 | 41·0 |
| Mothers’ attitude score | |||||||||||
| High | 103 | 88·5 | 48·0–137·1 | 6·7 | 5·2–10·2 | 146·4 | 48·1–311·5 | 59 | 57·3 | 31 | 30·1 |
| Intermediate | 106 | 75·5 | 31·0–155·0 | 7·5 | 5·4–9·5 | 154·5 | 28·0–259·0 | 63 | 59·4 | 44 | 41·5 |
| Low | 76 | 43·0* | 27·0–87·2 | 7·6 | 5·0–9·9 | 43·6 | 15·3–156·4* | 65* | 82·3 | 43* | 54·4 |
| Mothers’ behaviour score | |||||||||||
| High | 39 | 131·8 | 49·5–174·6 | 7·4 | 5·6–9·1 | 187·0 | 82·4–252·4 | 19 | 48·7 | 11 | 28·2 |
| Intermediate | 184 | 75·9 | 34·0–131·0 | 7·1 | 5·3–9·7 | 143·9 | 32·8–267·1 | 112 | 60·9 | 70 | 38·0 |
| Low | 65 | 44·5* | 26·5–83·5 | 7·6 | 5·1–10·2 | 34·4* | 15·9–140·0 | 56* | 86·2 | 37* | 56·9 |
*P<0·05.