Characteristic | Number (%)/Mean (s.d.) | |
---|---|---|
Mean age, years (s.d.) | 9.8 (1.6) | |
Sex | Female, n (%) | 490 (52.2) |
Male, n (%) | 448 (47.8) | |
Parental education(a) | University/polytechnic, n (%) | 127 (13.5) |
Secondary school or lower, n (%) | 811 (86.5) | |
Type of residence | Centrally heated, n (%) | 167 (17.8) |
Not centrally heated, n (%) | 373 (39.8) | |
Ger (Yurt), n (%) | 398 (42.4) | |
Mean monthly household income, US dollars (s.d.)(b) | 779 (592) | |
Home ownership | No, n (%) | 220 (23.5) |
Yes, n (%) | 718 (76.5) | |
Mean number of people/room (s.d.)(b) | 3.5 (1.8) | |
No. of smokers in household(c) | 0 | 530 (56.5) |
1 or more | 408 (43.5) | |
Child actively smoking | No, n (%) | 936 (99.8) |
Yes, n (%) | 2 (0.2) | |
BCG scar | Absent | 193 (20.6) |
Present | 745 (79.4) | |
Mean body mass index, kg/m2 (s.d.) | 17.1 (2.8) | |
Mean % body fat(c) (s.d.) | 17.7 (6.1) | |
Household PTB contact | No, n (%) | 780 (83.2) |
Yes, n (%) | 158 (16.8) | |
De-seasonalized serum 25(OH)D(b) | < 10 ng/ml, n (%) | 281 (30.1) |
≥10 ng/ml, n (%) | 652 (69.9) |