Table 2

Difference in body weight in kilograms, mean (95% CI) over any 11-year period by physical activity levels

 N*Physical activity categoriesp Value†p Value‡
InactiveBelow recommendedRecommendedAbove recommended
Men
 Model 18344Ref.0.02 (−0.18 to 0.22)−0.16 (−0.38 to 0.06)−1.46 (−0.38 to −1.16)<0.001
 Model 28334Ref.−0.12 (−0.31 to 0.07)−0.70 (−0.91 to −0.48)−2.10 (−2.39 to −1.81)<0.001
 Model 38230Ref.−0.21 (−0.41 to −0.01)−0.75 (−0.97 to −0.52)−1.80 (−2.10 to −1.49)<0.001
Stratified analyses§
 Age, years
  <405042Ref.0.25 (−0.22 to 0.72)−0.33 (−0.84 to 0.18)−1.08 (−1.72 to −0.43)0.003<0.001
  40–593096Ref.−0.44 (−0.73 to −0.16)−1.06 (−1.37 to −0.76)−1.89 (−2.32 to −1.46)<0.001
  ≥60206Ref.−0.32 (−0.87 to 0.23)−0.66 (−1.24 to −0.80)−1.68 (−2.43 to −0.94)<0.001
Occupational activity
 Sedentary1290Ref.−0.20 (−0.67 to 0.26)−0.95 (−1.44 to −0.46)−2.80 (−3.47 to −2.13)<0.0010.001
 Walk and life5976Ref.−0.17 (−0.47 to 0.13)−0.73 (−1.07 to −0.40)−1.78 (−2.26 to −1.30)<0.001
 Heavy719Ref.−0.40 (−0.99 to 0.18)−0.88 (−1.50 to −0.26)−1.07 (−1.79 to −0.34)0.001
Smoking status
 Never3225Ref.−0.31 (−0.61 to −0.004)−1.08 (−1.41 to −0.76)−2.45 (−2.88 to −2.02)<0.0010.005
 Former2293Ref.−0.12 (−0.48 to 0.23)−0.62 (−1.01 to −0.23)−2.18 (−2.69 to −1.66)<0.001
 Current2289Ref.0.08 (−0.35 to 0.50)−0.31 (−0.82 to 0.19)−1.62 (−2.34 to −0.89)0.001
BMI categories, kg/m2
 <18.532Ref.−2.37 (−5.34 to 0.60)0.47 (−2.82 to 3.75)−0.35 (−4.28 to 3.58)0.64<0.001
 18.5–24.94779Ref.0.68 (0.43 to 0.93)0.51 (0.24 to 0.77)−0.19 (−0.53 to 0.16)0.60
 25.0–29.93173Ref.0.07 (−0.15 to 0.29)−0.13 (−0.37 to 0.10)−0.97 (−1.29 to −0.65)<0.001
 ≥30.0360Ref.−1.24 (−1.90 to −0.58)−1.41 (−2.14 to −0.68)−2.53 (−3.60 to −1.46)<0.001
Women
 Model 110 783Ref.−0.23 (−0.42 to −0.04)−0.18 (−0.40 to 0.03)−1.41 (−1.76 to −1.06)<0.001
 Model 210 744Ref.−0.07 (−0.26 to 0.11)−0.49 (−0.70 to −027)−1.84 (−2.19 to −1.50)<0.001
 Model 310 413Ref.−0.16 (−0.36.0.03)−0.69 (−0.91 to −0.45)−2.10 (−2.48,−1.72)<0.001
Stratified analyses§
 Age, years
  <406245Ref.−0.21 (−0.62 to 0.19)−0.42 (−0.92 to 0.08)−0.78 (−1.70 to 0.13)0.04<0.001
  40–594163Ref.−0.31 (−0.59 to −0.03)−1.16 (−1.15 to −0.85)−2.24 (−2.86 to −1.83)<0.001
  ≥60375Ref.−0.44 (−0.94 to 0.07)−1.09 (−1.68 to −0.50)−3.31 (−4.22 to −2.41)<0.001
Occupational activity
 Sedentary1211Ref.−0.25 (−0.76 to 0.24)−1.04 (−1.57 to −0.50)−2.75 (−3.62 to −1.88)<0.0010.90
 Walk and life8176Ref.−0.22 (−0.46 to 0.02)−0.76 (−1.03 to −0.48)−2.12 (−2.59 to −1.66)<0.001
 Heavy825Ref.−0.52 (−1.82 to 0.78)−0.51 (−2.12 to 1.10)−2.76 (−5.11 to −0.41)0.05
Smoking status
 Never4423Ref.−0.16 (−0.44 to 0.12)−0.45 (−0.77 to −0.12)−1.77 (−2.29 to −1.25)<0.0010.09
 Former2235Ref.−0.17 (−0.57 to 0.23)−0.79 (−1.24 to −0.34)−2.44 (−3.12 to −1.76)<0.001
 Current3357Ref.−0.07 (−0.42 to 0.29)−0.43 (−0.86 to −0.01)−1.36 (−2.15 to −0.58)0.002
BMI categories, kg/m2
 <18.5245Ref.−0.04 (−0.82 to 0.75)0.59 (−0.49 to 1–67)2.34 (0.22 to 4.46)0.09<0.001
 18.5–24.97365Ref.0.19 (0.02 to 0.37)0.42 (0.22 to 0.62)−0.16 (−0.47 to 0.15)0.05
 25.0–29.92493Ref.−0.13 (−0.37 to 0.09)−0.19 (−0.45 to 0.06)−0.34 (−0.76 to 0.08)0.07
 ≥30.0680Ref.−0.99 (−1.58 to −0.39)−1.78 (−2.45 to −1.12)−2.32 (−3.52 to −1.11)<0.001
  • Model 1, adjusted for age; model 2 also for diabetes status (yes or no), smoking (never, former or current), and alcohol (abstainers, <1 time/14 days, 1–4 times/14 days or ≥5 times/14 days) and time period-dummies of HUNT wave (H1, H2 or H3) and model 3 additionally for occupational physical activity (sedentary, walk and life or heavy manual work).

  • *Number of participants at baseline (HUNT-1).

  • †p Value for trend across categories.

  • ‡p Value for interaction.

  • §Analytical model 2 is used in all stratified analyses.

  • BMI, body mass index; HUNT, Nord-Trøndelag County Health Study.