Table 2.
Difference in body weight (95% CI) in kilogram and interaction estimates between body weight and time by PAI categories.
| Men |
Women |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| PAI | N | HUNT1 | HUNT2 | HUNT3 | N | HUNT1 | HUNT2 | HUNT3 | |
| Model 1 | Inactive | Ref | 5.0 (4.6 to 5.3) | 10.0 (9.7 to 10.2) | Ref | 4.2 (3.8 to 4.5) | 7.6 (7.3 to 7.9) | ||
| ≤50 | 0.5 (0.3 to 0.8) | -0.6 (-1.0 to -0.2) | -2.4 (-2.7 to -2.0) | 0.4 (0.2 to 0.6) | -0.1 (-0.5 to 0.3) | -1.5 (-1.9 to -1.2) | |||
| 51-99 | 0.1 (-0.2 to 0.5) | 0.2 (-0.3 to 0.7) | -0.6 (-1.1 to -0.1) | -0.6 (-1.0 to -0.3) | 1.4 (0.9 to 1.9) | -0.2 (-0.6 to 0.3) | |||
| 100-199 | 0.1 (-0.2 to 0.3) | 0.7 (-0.4 to 0.5) | -1.0 (-1.4 to -0.6) | -0.8 (-1.3 to -0.3) | 0.8 (0.2 to 1.4) | 1.0 (0.3 to 1.7) | |||
| ≥200 | -1.1 (-1.4 to -0.8) | 0.0 (-0.5 to 0.5) | -1.6 (-2.0 to -1.2) | -0.3 (-0.6 to 0.0) | -0.2 (-0.7 to 0.3) | -0.7 (-1.1 to -0.3) | |||
| 40 037 | 45 206 | ||||||||
| Model 2 | Inactive | Ref | 4.9 (4.5 to 5.2) | 9.5 (9.2 to 9.7) | Ref | 4.1 (3.7 to 4.4) | 7.6 (7.3 to 7.9) | ||
| ≤50 | 0.4 (0.2 to 0.7) | -0.5 (-1.0 to -0.1) | -2.4 (-2.7 to -2.0) | 0.3 (0.0 to 0.5) | 0.1 (-0.3 to 0.6) | -1.6 (-1.9 to -1.2) | |||
| 51-99 | 0.0 (-0.3 to 0.4) | 0.2 (-0.3 to 0.7) | -0.7 (-1.2 to -0.2) | -0.8 (-1.1 to -0.4) | 1.5 (1.0 to 2.1) | -0.3 (-0.7 to 0.2) | |||
| 100-199 | -0.2 (-0.5 to 0.1) | 0.1 (-0.3 to 0.6) | -0.9 (-1.3 to -0.6) | -0.9 (-1.4 to -0.4) | 0.1 (0.3 to 1.6) | 0.8 (0.0 to 1.5) | |||
| ≥200 | -1.3 (-1.7 to -1.0) | 0.0 (-0.4 to 0.5) | -1.6 (-2.0 to -1.2) | -0.5 (-0.9 to -0.2) | 0.0 (-0.5 to 0.5) | -0.9 (-1.3 to -0.5) | |||
| 38 557 | 42 800 | ||||||||
| Model 3 | Inactive | Ref | 4.8 (4.4 to 5.2) | 9.1 (8.8 to 9.4)a | Ref | 4.7 (4.2 to 5.2) | 8.2 (7.9 to 8.6) | ||
| ≤50 | 0.2 (0.0 to 0.5) | -0.4 (-0.9 to 0.1) | -1.9 (-2.3 to -1.5) | -0.2 (-0.5 to 0.1) | 0.0 (-0.5 to 0.6) | -1.1 (-1.5 to -0.7) | |||
| 51-99 | 0.2 (-0.2 to 0.5) | -0.2 (-0.7 to 0.3) | -0.8 (-1.4 to -0.3) | -0.8 (-1.2 to -0.4) | 0.9 (0.3 to 1.5) | -0.2 (-0.8 to 0.3) | |||
| 100-199 | -0.2 (-0.5 to 0.1) | -0.2 (-0.6 to 0.3) | -1.2 (-1.6 to -0.8) | -0.8 (-1.3 to -0.3) | 0.2 (-0.5 to 0.9) | -0.2 (-0.9 to 0.6) | |||
| ≥200 | -1.3 (-1.6 to -0.9)a | -0.2 (-0.7 to 0.3) | -1.8 (-2.2 to -1.3)a | -0.2 (-0.5 to 0.2) | -0.9 (-1.5 to -0.3) | -2.1 (-2.5 to -1.6) | |||
| 32 764 | 35 746 | ||||||||
PAI: Personal Activity Intelligence, HUNT: The Trøndelag Health Study, CI: confidence interval, N: number
Model 1 adjusted for age.
Model 2 was further adjusted for diabetes status (yes or no), smoking status (never, former, current) and alcohol consumption (abstainers, <1 time/2 weeks, 1-4 times/2weeks or ≥5 times/2weeks).
Model 3 was further adjusted for occupational physical activity (sedentary, walk and lift and heavy).
Numbers in italic are interactions estimates between PAI category and HUNT wave. The interpretation is as follows: aCompared with the inactive group at HUNT1, those obtaining ≥200 at HUNT1 has 1.3 kg lower body weight at HUNT1. Compared to the same reference group, inactive men had 9.1 kg higher body weight at HUNT3, and men obtaining ≥200 at HUNT3 had 1.8 kg lower body weight increase at HUNT3 (interaction estimate).
Finally, the expected body weight in the ≥200 PAI group (eTable 2) can then be calculated with the following equation: body weight in reference group – 1.3 + 9.1 – 1.8.