Table 3.

Estimates of the percentage of BMI classes in the CPCSSN data sample stratified by age and sex, 2016

	PREVALENCE ESTIMATE (95% CI), %
AGE GROUP, Y	UNDERWEIGHT^{^*} (BMI < 18.5 KG/M²)	NORMAL WEIGHT^{^*} (BMI 18.5-24.9 KG/M²)	OVERWEIGHT^{^*} (BMI 25-29.9 KG/M²)	OBESE CLASS I^{^*} (BMI 30-34.9 KG/M²)	OBESE CLASS II^{^*} (BMI 35-39.9 KG/M²)	OBESE CLASS III^{^*} (BMI ≥ 40 KG/M²)
Total cohort
• 18-24	5.2 (4.5 to 5.8)	49.6 (48.1 to 51.2)^{^†}	24.8 (23.5 to 26.2)	11.1 (10.1 to 12.1)	5.7 (5.0 to 6.4)	3.5 (3.0 to 4.1)
• 25-34	2.1 (1.7 to 2.4)	37.8 (36.6 to 38.9)^{^†}	29.3 (28.2 to 30.4)^{^†}	16.7 (15.8 to 17.6)^{^†}	8.1 (7.4 to 8.7)	6.1 (5.5 to 6.7)
• 35-44	1.2 (1.0 to 1.5)	29.3 (28.4 to 30.3)^{^†}	30.6 (29.6 to 31.6)^{^†}	21.4 (20.5 to 22.3)^{^†}	10.4 (9.7 to 11.0)	7.1 (6.6 to 7.6)
• 45-54	0.8 (0.7 to 1.0)	24.2 (23.5 to 24.9)^{^†}	32.5 (31.7 to 33.3)	23.7 (23.0 to 24.4)^{^†}	11.6 (11.1 to 12.2)	7.2 (6.7 to 7.6)
• 55-64	1.0 (0.9 to 1.2)	22.6 (22.0 to 23.2)^{^†}	34.7 (34.0 to 35.4)	24.1 (23.5 to 24.7)^{^†}	11.1 (10.6 to 11.6)	6.5 (6.2 to 6.9)
• 65-74	0.9 (0.8 to 1.1)	19.4 (18.7 to 20.0)^{^†}	36.8 (36.0 to 37.6)^{^†}	26.4 (25.6 to 27.1)^{^†}	10.8 (10.3 to 11.4)	5.7 (5.3 to 6.1)
• ≥ 75	1.6 (1.4 to 1.9)	26.8 (26.0 to 27.7)^{^†}	40.0 (39.1 to 41.0)	21.2 (20.4 to 22.0)^{^†}	7.6 (7.1 to 8.1)	2.7 (2.4 to 3.0)
• All	1.4 (1.3 to 1.5)	26.4 (26.1 to 26.8)^{^†}	33.9 (33.6 to 34.3)^{^†}	22.4 (22.1 to 22.7)^{^†}	10.0 (9.8 to 10.2)	5.8 (5.7 to 6.0)
Men
• 18-24	4.7 (3.6 to 5.8)	47.0 (44.4 to 49.6)^{^†}	26.6 (24.3 to 28.9)	12.8 (11.0 to 14.5)^{^†}	5.8 (4.6 to 7.0)	3.2 (2.3 to 4.1)
• 25-34	1.6 (1.0 to 2.1)	28.1 (26.0 to 30.2)^{^†}	35.8 (33.5 to 38.1)	20.8 (18.9 to 22.7)^{^†}	8.4 (7.1 to 9.7)	5.4 (4.3 to 6.5)
• 35-44	0.6 (0.3 to 0.9)	18.0 (16.5 to 19.5)^{^†}	37.6 (35.7 to 39.4)	27.1 (25.4 to 28.8)^{^†}	10.0 (8.9 to 11.2)	6.8 (5.8 to 7.7)
• 45-54	0.5 (0.3 to 0.7)	14.7 (13.7 to 15.7)^{^†}	36.6 (35.3 to 37.9)^{^†}	28.8 (27.6 to 30.1)^{^†}	12.7 (11.8 to 13.6)	6.7 (6.0 to 7.4)
• 55-64	0.5 (0.3 to 0.6)	15.4 (14.6 to 16.2)^{^†}	38.9 (37.8 to 39.9)^{^†}	28.4 (27.3 to 29.4)^{^†}	11.3 (10.6 to 12.0)	5.7 (5.2 to 6.2)
• 65-74	0.5 (0.4 to 0.7)	13.9 (13.1 to 14.7)^{^†}	41.4 (40.2 to 42.5)	29.6 (28.5 to 30.7)^{^†}	10.3 (9.6 to 11.0)	4.3 (3.8 to 4.8)
• ≥ 75	0.7 (0.5 to 0.9)	22.7 (21.5 to 24.0)^{^†}	44.5 (43.0 to 45.9)	23.3 (22.1 to 24.6)^{^†}	6.7 (6.0 to 7.5)	2.1 (1.6 to 2.5)
• All	0.8 (0.7 to 0.9)	18.5 (18.0 to 18.9)^{^†}	39.0 (38.4 to 39.5)^{^†}	26.7 (26.2 to 27.2)^{^†}	10.1 (9.8 to 10.4)	5.0 (4.7 to 5.2)
Women
• 18-24	5.4 (4.5 to 6.3)	51.2 (49.2 to 53.1)^{^†}	23.8 (22.1 to 25.5)	10.2 (9.0 to 11.4)	5.7 (4.8 to 6.6)	3.8 (3.0 to 4.5)
• 25-34	2.2 (1.8 to 2.6)	41.1 (39.7 to 42.5)^{^†}	27.1 (25.9 to 28.3)	15.2 (14.3 to 16.2)	8.0 (7.2 to 8.7)	6.3 (5.7 to 7.0)
• 35-44	1.5 (1.2 to 1.8)	34.2 (33.0 to 35.3)^{^†}	27.6 (26.5 to 28.7)	19.0 (18.0 to 19.9)^{^†}	10.5 (9.8 to 11.3)	7.2 (6.6 to 7.9)
• 45-54	1.1 (0.8 to 1.3)	30.4 (29.4 to 31.4)^{^†}	29.8 (28.8 to 30.8)	20.4 (19.5 to 21.3)^{^†}	11.0 (10.3 to 11.6)	7.5 (6.9 to 8.0)
• 55-64	1.5 (1.2 to 1.7)	28.4 (27.5 to 29.3)^{^†}	31.3 (30.4 to 32.3)^{^†}	20.7 (19.9 to 21.5)^{^†}	10.9 (10.3 to 11.5)	7.2 (6.7 to 7.7)
• 65-74	1.3 (1.0 to 1.5)	24.4 (23.4 to 25.3)^{^†}	32.7 (31.7 to 33.8)	23.4 (22.4 to 24.4)	11.3 (10.6 to 12.0)	6.9 (6.4 to 7.5)
• ≥ 75	2.4 (2.0 to 2.8)	30.1 (28.9 to 31.3)^{^†}	36.5 (35.2 to 37.7)	19.5 (18.5 to 20.6)^{^†}	8.3 (7.5 to 9.0)	3.2 (2.8 to 3.7)
• All	1.8 (1.7 to 1.9)	31.8 (31.4 to 32.2)^{^†}	30.5 (30.1 to 31.0)	19.5 (19.1 to 19.9)^{^†}	10.0 (9.7 to 10.3)	6.4 (6.2 to 6.6)

BMI—body mass index, CCHS—Canadian Community Health Survey, CPCSSN—Canadian Primary Care Sentinel Surveillance Network.
↵* World Health Organization BMI classes.¹⁶
↵† Estimates that are statistically significantly different from the 2016 CCHS results. “Corrected” CCHS estimates were used when comparing CPCSSN estimates with CCHS estimates.