Risk factors for Mycobacterium tuberculosis infection among children in Greenland
Bolette Søborg, Aase Bengaard Andersen, Mads Melbye, Jan Wohlfahrt, Mikael Andersson, Robert J Biggar, Karin Ladefoged, Vibeke Ostergaard Thomsen & Anders Koch
Volume 89, Number 10, October 2011, 741-748E
Table 1. Comparison of demographic characteristics of schoolchildren in study population (n = 1797) and Greenlandic schoolchildren in general
| Characteristic | Study populationa | Greenlandic schoolchildrenb |
|---|---|---|
| Total (No.) | 1797 | 10 593 |
| Gender, No. (%) | ||
| Male | 892 (49.6) | 5382 (50.8) |
| Female | 905 (50.4) | 5211 (49.2) |
| Age (years) | ||
| Mean | 11.0 | 11.2 |
| SD | 3.0 | 3.1 |
| Median | 11 | 12 |
| Range | 5–19 | 6–16 |
| Ethnicity, No. (%)c | ||
| Inuit | 1734 (96.5) | 10 126 (95.6) |
| Non-Inuit | 63 (3.5) | 467 (4.4) |
| Danish | 53 (3.0) | 417 (3.9) |
| Other | 10 (0.5) | 50 (0.5) |
| Mother’s age (years) at child’s birth | ||
| Mean | 26.7 | 26.4 |
| SD | 5.9 | 5.9 |
| Median | 27 | 26 |
| Range | 15–46 | 14–52 |
| Mother’s total no. of liveborns (including study child) | ||
| Mean | 3.1 | 3.0 |
| SD | 1.6 | 1.5 |
| Median | 3 | 3 |
| Range | 1–11 | 1–11 |
SD, standard deviation.
a Includes participating schoolchildren recruited from five survey districts across Greenland.
b Includes all schoolchildren 6–16 years of age living in Greenland as of 31 December 2006 (data from the Danish Civil Registration System [CRS]).
c Unlike the rest of the paper, this table presents ethnicity among the study population based on a child’s birthplace to facilitate the comparison with the total population of Greenland (data from the CRS).