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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: Am J Prev Med. 2019 Apr 17;56(6):860–868. doi: 10.1016/j.amepre.2019.01.004

Table 3.

Weight Classification (Prevalence [%] and 95% CI) Based on Measured and Self-Reported BMI (kg/m2)

Wave/Weight classification Full samplea NEXT Plus subsample
Measured BMI Self-reported BMIb Measured BMI Self-reported BMI
1
 Underweightc 1.4 (0.8, 2.6) 1.7 (0.9, 3.2) 0 1.6 (0.8, 3.3)
 Normal weight 59.5 (55.9, 63.0) 68.2 (64.2, 71.9) 51.0 (46.8, 55.1) 61.0 (56.3, 65.5)
 Overweight 18.5 (16.5, 20.7) 16.9 (14.4, 19.7) 22.8 (19.5, 26.4) 19.0 (15.6, 23.0)
 Obese 20.6 (17.9,23.5) 13.2 (10.9, 15.9) 26.3 (22.8, 30.1) 18.3 (15.0, 22.3)
2
 Underweight 1.9 (1.1, 3.3) 2.9 (1.7, 4.9) 1.2 (0.5, 0.03) 1.5 (0.7, 3.2)
 Normal weight 63.6 (59.9, 67.2) 67.7 (63.4, 71.8) 55.7 (51.4, 59.9) 62.8 (58.3, 67.1)
 Overweight 16.0 (13.3, 19.0) 16.5 (13.5, 19.9) 20.0 (16.7, 23.6) 16.8 (13.7, 20.6)
 Obese 18.5 (15.6, 21.8) 12.9 (11.2, 15.0) 23.2 (19.8, 27.1) 18.8 (15.5, 22.7)
3
 Underweight 2.2 (1.4, 3.6) 3.3 (2.2, 5.0) 1.0 (0.4, 2.4) 1.5 (0.6, 3.7)
 Normal weight 61.9 (57.6, 65.9) 66.0 (60.5, 71.2) 55.7 (51.3, 60.0) 62.2 (56.8, 67.4)
 Overweight 15.4 (12.6, 18.5) 16.3 (13.0, 20.2) 19.9 (16.6, 23.7) 19.8 (15.8, 24.5)
 Obese 20.6 (17.1, 24.5) 14.4 (11.6, 17.7) 23.3 (19.8, 27.3) 16.4 (12.7, 20.9)
4
 Underweight 2.3 (1.3, 4.3) 2.4 (1.3, 4.6)
 Normal weight 52.9 (48.2, 57.6) 56.5 (51.4, 61.5)
 Overweight 21.3 (17.7, 25.5) 22.6 (18.6, 27.1)
 Obese 23.4 (19.6, 27.7) 18.5 (14.8, 22.8)
7
 Underweight 2.5 (1.1, 4.5) 2.3 (1.1, 4.5)
 Normal weight 31.4 (27.1, 36.1) 36.4 (31.5, 41.5)
 Overweight 31.7 (27.3, 36.4) 33.0 (28.2, 38.1)
 Obese 34.4 (29.9, 39.2) 28.4 (23.9, 33.4)
a

Weighted estimates are presented for the full sample.

b

Biologically implausible self-reported values excluded from analyses.

c

Weight classification according to Centers for Disease Control and Prevention age- and sex-specific BMI percentile cut-offs until age 20 years (underweight= <5; normal weight= ≥5, <85; overweight= ≥85, <95; obese= ≥95). From age ≥20 years, underweight=BMI <18.5; normal weight=BMI ≥18.5, <25; overweight=BMI ≥25, <30; obese=BMI ≥30.