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Table 2 Weight classification at baseline and year five (including imputed) for women. Values are expressed as frequencies and percent of age group total

From: Changes in body mass index in Canadians over a five-year period: Results of a prospective, population-based study

Baseline Age

Time

Sample Size*

Underweight

Normal Weight

Overweight

Obese Class I

Obese Class II

Obese Class III

25 – 34

Baseline

Year 5

187

188

5 (2.7)

4 (2.1)

101 (54.0)

84 (44.7)

50 (26.7)

56 (29.8)

15 (8.0)

25 (13.3)

10 (5.4)

11 (5.9)

6 (3.2)

8 (4.3)

35 – 44

Baseline

Year 5

278

277

3 (1.1)

3 (1.1)

155 (55.8)

140 (50.5)

70 (25.2)

66 (23.8)

34 (12.2)

44 (15.9)

7 (2.5)

16 (5.8)

9 (3.2)

8 (2.9)

45 – 54

Baseline

Year 5

1082

1083

10 (0.9)

12 (1.1)

433 (40.0)

382 (35.3)

377 (34.8)

382 (35.3)

158 (14.6)

189 (17.5)

81 (7.5)

79 (7.3)

23 (2.1)

39 (3.6)

55 – 64

Baseline

Year 5

1564

1562

19 (1.2)

28 (1.8)

526 (33.6)

469 (30.0)

629 (40.2)

623 (39.9)

269 (17.2)

315 (20.2)

87 (5.6)

92 (5.9)

34 (2.2)

35 (2.2)

65 – 74

Baseline

Year 5

1945

1940

37 (1.9)

56 (2.9)

680 (35.0)

692 (35.7)

735 (37.8)

713 (36.8)

362 (18.6)

352 (18.1)

99 (5.1)

99 (5.1)

32 (1.7)

28 (1.4)

75 +

Baseline

Year 5

920

918

24 (2.6)

49 (5.3)

367 (39.9)

414 (45.1)

351 (38.2)

317 (34.5)

142 (15.4)

113 (12.3)

32 (3.5)

22 (2.4)

4 (0.4)

3 (0.3)

  1. * Baseline and year 5 values are not always identical due to rounding in the imputation process.
  2. Underweight = BMI<18; Normal weight = BMI 18.5–24.99; Overweight = BMI 25.0–29.99; Obese Class I = BMI 30.0–34.99; Obese Class II = BMI 35.0–39.99; Obese Class III = BMI ≥ 40.0