← Back to the work-schedule question · Front page

Overarching question: Is a more intense work schedule associated with different glucose levels?

What we compared (: “independent variable”)

Your work schedule:

• 4d × 10hrs: 4 days a week, 10 hours a day (until December 2025)
• 3d × 10hrs: 3 days a week, 10 hours a day (January to April 2026)
• 3d × 8hrs: 3 days a week, 8 hours a day (from May 2026)

What we measured (: “dependent variable”)

Your glucose on each day you wore the sensor:

• lowest reading
• average reading
• highest reading

Results

• The lowest reading did not differ significantly between any of the schedules.
• The average reading under 4d × 10hrs was significantly higher than under the other schedules.
• The highest reading under 4d × 10hrs was significantly higher than under 3d × 8hrs.

121 days of CGM readings, Feb 2023 – Jul 2026. Each dot below is one day. The black mark is the typical day for that schedule, with a bar showing how much it might move with a different set of days.

Your lowest reading of the day

Your average reading of the day

Your highest reading of the day

Discussion

• Yes. Your most intense schedule, 4d × 10hrs (40 hours a week), went with:
  • a higher daily average than 3d × 10hrs, by 10 mg/dL
  • a higher daily average than 3d × 8hrs, by 11 mg/dL
  • a higher daily high than 3d × 8hrs, by 25 mg/dL
  • no difference in your daily low
• Caveats
  • Few days: 15 days of 3d × 10hrs and 8 days of 3d × 8hrs, each from a single stretch of wear. More days, spread over more weeks, would make this firmer.
  • Other things changed too: the lighter schedules were all in 2026, measured through a newer app.
  • The drop may have started earlier: in 2025, still on 4d × 10hrs, your daily average was already down to 101, from 108 before.
  • Season looks unlikely to explain it: on 4d × 10hrs, your daily average was 109 in winter and 107 in summer.

What would you like to know next? →

All the numbers on this page

Schedule	Days	Typical lowest	Typical average	Typical highest
4d × 10hrs	98	76	107	165
3d × 10hrs	15	68	96	152
3d × 8hrs	8	70	96	139

How sure: each gap was tested by shuffling the days between the two schedules 10,000 times and counting how often chance alone made a gap as big. That share is the p-value. Nine comparisons were made, so each p-value is also shown corrected for that (Holm); "significant" means corrected p under 0.05.

Reading	Comparison	Gap mg/dL	p	corrected p
lowest	3d × 10hrs vs 4d × 10hrs	-8	0.023	0.137
lowest	3d × 8hrs vs 4d × 10hrs	-6	0.205	0.737
lowest	3d × 8hrs vs 3d × 10hrs	+2	0.625	1.000
average	3d × 10hrs vs 4d × 10hrs	-10	0.000	0.000
average	3d × 8hrs vs 4d × 10hrs	-11	0.000	0.001
average	3d × 8hrs vs 3d × 10hrs	-0	0.959	1.000
highest	3d × 10hrs vs 4d × 10hrs	-12	0.023	0.137
highest	3d × 8hrs vs 4d × 10hrs	-25	0.001	0.007
highest	3d × 8hrs vs 3d × 10hrs	-13	0.184	0.737

Any questions or comments, please reach out to bill@persci.app. A person reads every one.

Made by PerSci from your CGM export. It describes a pattern in your readings; it is not medical advice.