Table 1 Characteristics of thyroid volume overall and by subgroups, Belarus, 1996-2004, total N = 10,703
Overall, n (%) | Thyroid volume (ml) | P-valuea | |||||
|---|---|---|---|---|---|---|---|
Mean | Median | 95% CI | IQR | ||||
Overall | 10,703 (100) | 12.9 | 12.2 | 12.9, 13.0 | 5.5 | ||
Sex | < 0.001 | ||||||
Female | 5472 (51) | 12.0 | 11.4 | 11.9, 12.1 | 4.5 | ||
Male | 5231 (49) | 13.9 | 13.3 | 13.8, 14.1 | 6.2 | ||
Age at screening (years) | < 0.001 | ||||||
10-17 | 3312 (31) | 10.5 | 10.0 | 10.4, 10.6 | 4.4 | ||
18-33 | 7391 (69) | 14.0 | 13.2 | 13.9, 14.1 | 5.5 | ||
Oblast of residence at screening | < 0.001 | ||||||
Minsk | 2973 (28) | 13.1 | 12.3 | 12.9, 13.3 | 5.5 | ||
Gomel | 6522 (61) | 12.6 | 11.9 | 12.5, 12.7 | 5.3 | ||
Otherb | 1208 (11) | 14.6 | 13.7 | 14.2, 14.9 | 6.5 | ||
Urban/rural status | 0.096 | ||||||
Urban | 6537 (61) | 12.8 | 12.1 | 12.7, 13.0 | 5.8 | ||
Rural | 4166 (39) | 13.1 | 12.4 | 13.0, 13.3 | 5.4 | ||
Urinary iodine concentrationc (mcg/L) | 0.002 | ||||||
< 20 | 1156 (11) | 13.5 | 12.7 | 13.2, 13.8 | 5.9 | ||
20-49 | 2781 (26) | 13.0 | 12.2 | 12.8, 13.2 | 5.6 | ||
50-99 | 2993 (28) | 12.9 | 12.2 | 12.7, 13.0 | 5.6 | ||
≥ 100 | 3773 (35) | 12.8 | 12.0 | 12.6, 12.9 | 5.4 | ||