Testing a proposed mathematical model of weight loss in women enrolled on a commercial weight-loss programme: the LighterLife study
2024

Mathematical Model for Weight Loss in Women

Sample size: 983 publication 10 minutes Evidence: moderate

Author Information

Author(s): Egan Aoife M., Rayman John F., Collins Adam L.

Primary Institution: University of Surrey

Hypothesis

Can a mathematical model accurately predict weight loss in women on a commercial weight-loss programme?

Conclusion

The proposed mathematical model predicted weight loss within 0.75% of actual results in women participating in a weight-loss programme.

Supporting Evidence

  • The model predicted post-intervention weight loss within 0.75% of that observed.
  • Mean weight loss across all intervention lengths was 7.90 kg.
  • Best model agreement was observed from 6 to 9 weeks of intervention.
  • Mean error increased with intervention length, indicating less accuracy over longer durations.

Takeaway

This study created a math formula to help predict how much weight women will lose on a diet, and it worked pretty well!

Methodology

A mathematical model was developed and tested using weight-loss data from women on a very low-energy diet.

Potential Biases

Potential bias due to self-reported data on energy intake and adherence to the diet.

Limitations

The model relies on assumptions about energy intake and expenditure, which may not reflect real-world variations.

Participant Demographics

Participants were 983 females, average age 47, with a mean body weight of 93.31 kg and BMI of 34.51 kg/m2.

Statistical Information

P-Value

0.0006

Confidence Interval

–5.65–6.86 kg

Statistical Significance

p<0.05

Digital Object Identifier (DOI)

10.1017/jns.2024.85

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