Table 1.
Baseline characteristics of total sample, participants with complete weight data (n=3193), and participants with incomplete weight data.
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|
Total (N=36,794) | Complete data (n=3193) | Incomplete data (n=33,601) | P valuea | |||||
| Age (years), mean (SD) | 46.7 (11.1) | 48.7 (10.5) | 46.5 (11.1) | <.001 | |||||
| Sex, n (%) | .16 | ||||||||
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Male | 2892 (7.86) | 272 (8.52) | 2620 (7.79) |
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Female | 33,902 (92.14) | 2921 (91.48) | 30,981 (92.2) |
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| BMI (kg/m2), mean (SD) | 34.0 (6.46) | 33.5 (6.39) | 34.1 (6.46) | <.001 | |||||
| IMDb decile, n (%) | .07 | ||||||||
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1-3 | 4379 (11.9) | 357 (11.18) | 4022 (11.97) |
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4-7 | 12,091 (32.86) | 1054 (33.01) | 11,037 (32.85) |
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8-10 | 11,921 (32.39) | 1103 (34.54) | 10,818 (32.19) |
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Missing | 8403 (22.84) | 679 (21.27) | 7724 (22.99) |
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aP values were calculated using 2-tailed t tests for continuous variables or chi-squared tests for categorical variables to compare differences between participants with complete weight data and participants with incomplete weight data. Complete data were defined as having weight readings recorded at all time points (ie, at 4, 12, and 24 weeks).
bIMD: Index of Multiple Deprivation.