Table 1: Mean BMI percentile of grade 6–10 students by immigration status and additional covariables based on the 2010 Canadian Health Behaviour in School-aged Children study (weighted sample n = 19 272)*
Characteristics of the study populationWeighted sample, no. (%)BMI percentileSignificance of difference, p
Mean (95% CI)Difference from reference group
(95% CI)
Country of birth
Canadian born17 659 (91.6)58 (57 to 58)Reference
Foreign born1 613 (8.4)54 (52 to 55)−4 (−6 to −2)< 0.001
Time since immigration, yr
Canadian born17 659 (91.6)58 (57 to 58)Reference
≥ 6891 (4.6)52 (50 to 54)−6 (−8 to −4)< 0.001
3–5 396 (2.1)56 (53 to 59)−2 (−5 to 1)0.30
1–2 325 (1.7)55 (52 to 59)−2 (−6 to 1)0.23
Ethnicity
Canadian host culture15 071 (78.2)57 (57 to 58)Reference
Arab and West Asian 300 (1.6)58 (54 to 61)1 (−3 to 4)0.78
African737 (3.8)60 (58 to 62)3 (0 to 5)0.028
East Indian and South Asian 559 (2.9)52 (49 to 55)−5 (−8 to −3)< 0.001
East and Southeast Asian1 089 (5.7)53 (51 to 56)−4 (−6 to −2)< 0.001
Latin American 187 (1.0)60 (56 to 65)3 (−2 to 7)0.24
Other‡ 1 330 (6.9)59 (57 to 60)1 (0 to 3)0.15
Individual-level covariables
Sex
Male9 567 (49.6)61 (60 to 62)Reference
Female9 705 (50.4)53 (52 to 54)−8 (−9 to −7)< 0.001
Perceived family wealth
Well off11 064 (57.4)56 (55 to 57)Reference
Average6 436 (33.4)58 (57 to 59)2 (1 to 3)< 0.001
Worse off1 772 (9.2)61 (59 to 63)5 (3 to 6)< 0.001
Area-level covariables
Median annual household income, $
Quartile 4: > 67 6054 512 (23.4)56 (55 to 58)Reference
Quartile 3: 53 115–67 6054 440 (23.0)56 (54 to 58)0 (−2 to 2)0.85
Quartile 2: 43 571–53 1144 311 (22.4)56 (55 to 58)0 (−2 to 2)0.99
Quartile 1: < 43 5716 008 (31.2)59 (58 to 61)3 (1 to 5)0.002
Immigrants in the community, %
Quartile 4: ≥ 176 399 (33.2)55 (54 to 56)Reference
Quartile 3: 9 to < 175 095 (26.4)58 (57 to 60)3 (1 to 5)< 0.001
Quartile 2: 3 to < 94 319 (22.4)58 (57 to 60)3 (1 to 5)< 0.001
Quartile 1: < 33 459 (18.0)58 (56 to 60)3 (1 to 5)0.008
Statistics Canada population centre category
Large urban centre6 275 (32.6)56 (54 to 57)Reference
Medium centre3 501 (18.2)57 (55 to 59)1 (−1 to 3)0.24
Small centre8 898 (46.2)58 (57 to 59)2 (0 to 4)0.015
Rural597 (3.1)60 (57 to 64)5 (1 to 8)0.019

Note: CI = confidence interval. 
*n values were weighted according to the Canadian Health Behaviour in School-aged Children study protocol.22 Totals in a category may vary slightly due to rounding.
†We compared the levels of the variables for significant differences while controlling for the clustering effect of school.
‡The “other” ethnic group includes youth who identified with more than 1 of the 6 ethnic groups.