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Based on data from 33 participants, Overall Mood is generally highest after a daily total of 310 grams of Carbs intake over the previous 7 days.
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People with higher Carbs intake usually have lower Overall Mood
Each column represents the number of days this value occurred.
This chart shows the typical value recorded for Carbs on each day of the week.
This chart shows the typical value recorded for Carbs for each month of the year.
Each column represents the number of days this value occurred.
This chart shows the typical value recorded for Overall Mood on each day of the week.
This chart shows the typical value recorded for Overall Mood for each month of the year.

Abstract

Aggregated data from 33 study participants suggests with a medium degree of confidence (p=0.19202098076139, 95% CI -0.489 to 0.385) that Carbs has a very weakly negative predictive relationship (R=-0.05) with Overall Mood. The highest quartile of Overall Mood measurements were observed following an average 888.35 grams Carbs per day. The lowest quartile of Overall Mood measurements were observed following an average 946.11567721326 g Carbs per day.

Objective

The objective of this study is to determine the nature of the relationship (if any) between Carbs and Overall Mood. Additionally, we attempt to determine the Carbs values most likely to produce optimal Overall Mood values.

Participant Instructions

Get MyFitnessPal here and use it to record your Carbs. Once you have a MyFitnessPal account, you can import your data from the Import Data page. This individual's data will automatically be imported and analyzed.
Record your Overall Mood daily in the reminder inbox or using the interactive web or mobile notifications.

Design

This study is based on data donated by 33 participants. Thus, the study design is equivalent to the aggregation of 33 separate n=1 observational natural experiments.

Data Analysis

Carbs Pre-Processing
Carbs measurement values below 0 grams were assumed erroneous and removed. No maximum allowed measurement value was defined for Carbs. No missing data filling value was defined for Carbs so any gaps in data were just not analyzed instead of assuming zero values for those times.
Carbs Analysis Settings

Overall Mood Pre-Processing
Overall Mood measurement values below 1 out of 5 were assumed erroneous and removed. Overall Mood measurement values above 5 out of 5 were assumed erroneous and removed. No missing data filling value was defined for Overall Mood so any gaps in data were just not analyzed instead of assuming zero values for those times.
Overall Mood Analysis Settings

Predictive Analytics
It was assumed that 0 hours would pass before a change in Carbs would produce an observable change in Overall Mood. It was assumed that Carbs could produce an observable change in Overall Mood for as much as 7 days after the stimulus event.
Predictive Analysis Settings

Data Sources

Carbs data was primarily collected using MyFitnessPal. Lose weight with MyFitnessPal, the fastest and easiest-to-use calorie counter for iPhone and iPad. With the largest food database of any iOS calorie counter (over 3,000,000 foods), and amazingly fast food and exercise entry.

Overall Mood data was primarily collected using QuantiModo. QuantiModo allows you to easily track mood, symptoms, or any outcome you want to optimize in a fraction of a second. You can also import your data from over 30 other apps and devices. QuantiModo then analyzes your data to identify which hidden factors are most likely to be influencing your mood or symptoms.

Limitations

As with any human experiment, it was impossible to control for all potentially confounding variables. Correlation does not necessarily imply causation. We can never know for sure if one factor is definitely the cause of an outcome. However, lack of correlation definitely implies the lack of a causal relationship. Hence, we can with great confidence rule out non-existent relationships. For instance, if we discover no relationship between mood and an antidepressant this information is just as or even more valuable than the discovery that there is a relationship.
We can also take advantage of several characteristics of time series data from many subjects to infer the likelihood of a causal relationship if we do find a correlational relationship. The criteria for causation are a group of minimal conditions necessary to provide adequate evidence of a causal relationship between an incidence and a possible consequence.

The list of the criteria is as follows:
Strength (A.K.A. Effect Size)
A small association does not mean that there is not a causal effect, though the larger the association, the more likely that it is causal. There is a very weakly negative relationship between Carbs intake and Overall Mood

Consistency (A.K.A. Reproducibility)
Consistent findings observed by different persons in different places with different samples strengthens the likelihood of an effect. Furthermore, in accordance with the law of large numbers (LLN), the predictive power and accuracy of these results will continually grow over time. 108 paired data points were used in this analysis. Assuming that the relationship is merely coincidental, as the participant independently modifies their Carbs intake values, the observed strength of the relationship will decline until it is below the threshold of significance. To it another way, in the case that we do find a spurious correlation, suggesting that banana intake improves mood for instance, one will likely increase their banana intake. Due to the fact that this correlation is spurious, it is unlikely that you will see a continued and persistent corresponding increase in mood. So over time, the spurious correlation will naturally dissipate.

Specificity
Causation is likely if a very specific population at a specific site and disease with no other likely explanation. The more specific an association between a factor and an effect is, the bigger the probability of a causal relationship.

Temporality
The effect has to occur after the cause (and if there is an expected delay between the cause and expected effect, then the effect must occur after that delay). The confidence in a causal relationship is bolstered by the fact that time-precedence was taken into account in all calculations.

Biological Gradient
Greater exposure should generally lead to greater incidence of the effect. However, in some cases, the mere presence of the factor can trigger the effect. In other cases, an inverse proportion is observed: greater exposure leads to lower incidence.

Plausibility
A plausible bio-chemical mechanism between cause and effect is critical. This is where human brains excel. Based on our responses so far, 7 humans feel that there is a plausible mechanism of action and 9 feel that any relationship observed between Carbs intake and Overall Mood is coincidental.

Coherence
Coherence between epidemiological and laboratory findings increases the likelihood of an effect. It will be very enlightening to aggregate this data with the data from other participants with similar genetic, diseasomic, environmentomic, and demographic profiles.

Experiment
All of human life can be considered a natural experiment. Occasionally, it is possible to appeal to experimental evidence.

Analogy
The effect of similar factors may be considered.

Relationship Statistics

Property Value
Cause Variable Name Carbs intake
Effect Variable Name Overall Mood
Sinn Predictive Coefficient 0.028761120022081
Confidence Level medium
Confidence Interval 0.43699652708368
Forward Pearson Correlation Coefficient -0.0517
Critical T Value 1.7529375
Total Carbs intake Over Previous 7 days Before ABOVE Average Overall Mood 888.35 grams
Total Carbs intake Over Previous 7 days Before BELOW Average Overall Mood 946.11567721326 grams
Duration of Action 7 days
Effect Size very weakly negative
Number of Paired Measurements 108
Optimal Pearson Product 0.060268587207786
P Value 0.19202098076139
Statistical Significance 0.36056363639408
Strength of Relationship 0.43699652708368
Study Type population
Analysis Performed At 2019-04-04
Number of Participants 33

Carbs Statistics

Property Value
Variable Name Carbs
Aggregation Method SUM
Analysis Performed At 2019-03-26
Duration of Action 7 days
Kurtosis 6.667673159622
Mean 110.7729231405 grams
Median 89.139730553302 grams
Minimum Allowed Value 0 grams
Number of Correlations 160
Number of Measurements 23218
Onset Delay 0 seconds
Standard Deviation 135.00726947136
Unit Grams
UPC 817047020287
Variable ID 1285
Variance 457627.00550194

Overall Mood Statistics

Property Value
Variable Name Overall Mood
Aggregation Method MEAN
Analysis Performed At 2019-04-03
Duration of Action 24 hours
Kurtosis 3.7383708126619
Maximum Allowed Value 5 out of 5
Mean 3.1156748504321 out of 5
Median 3.1369047348216 out of 5
Minimum Allowed Value 1 out of 5
Number of Correlations 1149
Number of Measurements 605816
Onset Delay 0 seconds
Standard Deviation 0.56833853113207
Unit 1 to 5 Rating
UPC 767674073845
Variable ID 1398
Variance 0.43884384603152


Tracking Carbs

Get MyFitnessPal here and use it to record your Carbs. Once you have a MyFitnessPal account, you can import your data from the Import Data page. This individual's data will automatically be imported and analyzed.

Tracking Overall Mood

Record your Overall Mood daily in the reminder inbox or using the interactive web or mobile notifications.
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https://lh6.googleusercontent.com/-BHr4hyUWqZU/AAAAAAAAAAI/AAAAAAAIG28/2Lv0en738II/photo.jpg Principal Investigator - Mike Sinn