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Condition (MeSH)

Body Weight Changes

ClinicalTrials.gov lists 2,634 trials for Body Weight Changes or a narrower condition beneath it. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) has the most among industry and government lead sponsors, with 29.

MeSH D001836 Pathological Conditions, Signs and Symptoms C23
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Phase 1 Phase 1 81 Phase 1/2 Phase 1/2 26 Phase 2 Phase 2 165 Phase 2/3 Phase 2/3 31 Phase 3 Phase 3 114 Phase 4 Phase 4 118 Not applicable Not applicable 1,708 Observational Observational 389 Phase 1 Phase 1 81 Phase 1/2 Phase 1/2 26 Phase 2 Phase 2 165 Phase 2/3 Phase 2/3 31 Phase 3 Phase 3 114 Phase 4 Phase 4 118 Not applicable Not applicable 1,708 Observational Observational 389

Trials per phase (log scale)

1 more section with rows

229 of the 2,634 trials are tagged with Body Weight Changes itself; the rest are tagged with a narrower condition beneath it.

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The PDF carries up to 50 rows of each section, where the page shows the first few, with the sources listed. Enter a work email and confirm it from the message we send, and the report follows by email.

When did Body Weight Changes trials start? (33)

Shown in this order: most recent first, 1990 onwards. 2026 is partial: trials registered with a 2026 start date so far, not a full year. 7 trials are registered to start in 2027 or later, and not listed here.

Trials over time, by phase

  • Phase 1
  • Phase 1/2
  • Phase 2
  • Phase 2/3
  • Phase 3
  • Phase 4
  • Not applicable
  • Observational
  • Other (Unknown)

Top of scale: 169

1993: 1 trials (Not applicable 1) 1995: 1 trials (Not applicable 1) 1996: 1 trials (Observational 1) 1997: 2 trials (Not applicable 1, Phase 2 1) 1998: 5 trials (Observational 2, Phase 3 2, Phase 2 1) 1999: 7 trials (Not applicable 4, Phase 3 1, Phase 1/2 2) 2000: 9 trials (Not applicable 2, Phase 4 1, Phase 3 3, Phase 2 1, Phase 1 2) 2001: 11 trials (Observational 1, Not applicable 6, Phase 4 1, Phase 3 1, Phase 2 2) 2002: 21 trials (Not applicable 13, Phase 4 1, Phase 3 4, Phase 2 2, Phase 1 1) 2003: 31 trials (Observational 1, Not applicable 12, Phase 4 3, Phase 3 4, Phase 2/3 2, Phase 2 6, Phase 1/2 3) 2004: 42 trials (Observational 3, Not applicable 19, Phase 4 7, Phase 3 4, Phase 2/3 1, Phase 2 6, Phase 1/2 1, Phase 1 1) 2005: 48 trials (Observational 6, Not applicable 17, Phase 4 4, Phase 3 5, Phase 2/3 1, Phase 2 9, Phase 1/2 2, Phase 1 4) 2006: 56 trials (Observational 11, Not applicable 24, Phase 4 5, Phase 3 8, Phase 2 2, Phase 1/2 1, Phase 1 5) 2007: 83 trials (Observational 9, Not applicable 46, Phase 4 5, Phase 3 4, Phase 2/3 1, Phase 2 13, Phase 1/2 2, Phase 1 3) 2008: 82 trials (Observational 19, Not applicable 37, Phase 4 4, Phase 3 4, Phase 2 12, Phase 1/2 1, Phase 1 5) 2009: 80 trials (Observational 12, Not applicable 48, Phase 4 2, Phase 3 4, Phase 2/3 3, Phase 2 7, Phase 1/2 1, Phase 1 3) 2010: 86 trials (Observational 14, Not applicable 57, Phase 4 2, Phase 3 6, Phase 2/3 1, Phase 2 2, Phase 1 4) 2011: 88 trials (Observational 9, Not applicable 52, Phase 4 2, Phase 3 10, Phase 2/3 1, Phase 2 8, Phase 1/2 4, Phase 1 2) 2012: 105 trials (Observational 13, Not applicable 72, Phase 4 3, Phase 3 3, Phase 2/3 3, Phase 2 9, Phase 1 2) 2013: 92 trials (Observational 15, Not applicable 63, Phase 3 3, Phase 2/3 3, Phase 2 5, Phase 1/2 2, Phase 1 1) 2014: 100 trials (Observational 13, Not applicable 65, Phase 4 3, Phase 3 5, Phase 2/3 3, Phase 2 7, Phase 1 4) 2015: 107 trials (Observational 14, Not applicable 80, Phase 4 2, Phase 3 3, Phase 2/3 1, Phase 2 4, Phase 1/2 1, Phase 1 2) 2016: 126 trials (Observational 22, Not applicable 94, Phase 4 3, Phase 3 3, Phase 2 3, Phase 1 1) 2017: 136 trials (Other 1, Observational 21, Not applicable 98, Phase 4 4, Phase 3 2, Phase 2 8, Phase 1 2) 2018: 137 trials (Observational 18, Not applicable 102, Phase 4 8, Phase 3 2, Phase 2 3, Phase 1/2 2, Phase 1 2) 2019: 132 trials (Observational 13, Not applicable 104, Phase 4 6, Phase 3 4, Phase 2/3 1, Phase 2 2, Phase 1/2 1, Phase 1 1) 2020: 115 trials (Observational 26, Not applicable 77, Phase 4 3, Phase 3 2, Phase 2/3 1, Phase 2 2, Phase 1 4) 2021: 147 trials (Observational 21, Not applicable 110, Phase 4 5, Phase 3 2, Phase 2 4, Phase 1 5) 2022: 156 trials (Observational 29, Not applicable 103, Phase 4 9, Phase 3 3, Phase 2/3 1, Phase 2 7, Phase 1 4) 2023: 169 trials (Other 1, Observational 25, Not applicable 123, Phase 4 7, Phase 3 3, Phase 2/3 1, Phase 2 6, Phase 1/2 1, Phase 1 2) 2024: 141 trials (Observational 20, Not applicable 96, Phase 4 8, Phase 3 5, Phase 2/3 1, Phase 2 8, Phase 1 3) 2025: 152 trials (Observational 24, Not applicable 92, Phase 4 9, Phase 3 6, Phase 2/3 2, Phase 2 10, Phase 1/2 1, Phase 1 8)

Trials registered with a start date in each year, 1990 onward, stacked by phase (complete years only; the current partial year is in the table's notes). The table below lists the same counts, most recent years first.

Trials started per year
Year Trials started
2026 (partial year) 140
2025 152
2024 141
2023 169
2022 156
2021 147
2020 115
2019 132
2018 137
2017 136

Forecast of the full-year count, planned starts included, not rows of this table: about 160 trials starting in 2026 and about 150 in 2027, the average of the 24 months through September, counted as registered and carried forward. The rows of this table count trials registered so far with a start date in the year, planned starts included; the forecast looks ahead to the count for the whole year, so it is not the same measure. In backtests on conditions of this size, forecasts made part-way through the year were typically off by about 13 percent and ran about 12 percent low against the count later registered; forecasts made before the year began were off by about 19 percent and ran about 17 percent low against the count later registered, and had about the same error as repeating last year's count. These figures rest on a few years of history (target years from 2018 to 2025, varying by figure), place each condition as it is mapped today rather than as it was then, and score against a count for the newest year that was still being revised. Only condition series were scored.

Prediction, not a registry value: median of 36 months from start to primary completion across 263 trials still running at the 2026-10-09 snapshot; registered median of 22 months across 1,757 trials with a primary completion typed Actual. Source: ClinicalTrials.gov / AACT (CTTI), public domain.

What phase are Body Weight Changes trials in? (9)

Shown in this order: phase order.

Show the trials by phase as a table
Trials by phase
Phase Trials
Phase 1 81
Phase 1/2 26
Phase 2 165
Phase 2/3 31
Phase 3 114
Phase 4 118
Not applicable 1,708
Observational 389
Unknown 2

How many Body Weight Changes trials are recruiting? (9)

Shown in this order: the order a trial moves through, from not yet recruiting to unknown.

Trials by recruitment status
Status Trials
Not yet recruiting 99
Recruiting 270
Enrolling by invitation 14
Active, not recruiting 109
Completed 1,662

Status as registered on ClinicalTrials.gov. Each trial is counted once.

Which lead sponsors run the most Body Weight Changes trials? (2)

Shown in this order: most trials first. Lead sponsors the registry classes as industry, NIH, US federal, other government or network. A hospital or university the registry files as government can appear here. Sponsors it classes as academic or other are shown on the full page, because that class cannot separate an institution from a named investigator.

Lead sponsors
Sponsor Trials
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) 29
VA Office of Research and Development 22

Which drugs are being tested for Body Weight Changes? (5)

Shown in this order: most trials first. One row per drug, matched to a single molecule under all its names, ranked by number of trials.

Drugs tested
Drug Trials
Semaglutide 21
TIRZEPATIDE 15
LIRAGLUTIDE 11
Exenatide 9
Anamorelin HCl 9

Interventions as named in the registry (10)

Shown in this order: most trials first.

Interventions as named in the registry
Drug Trials
Weight loss 38
Exercise 33
1% Metformin 19
Control (placebo) group 18
Diet 17

These are the names sponsors entered on ClinicalTrials.gov that we have not matched to a single molecule. Some are drugs under a brand or code name; others are procedures, doses or arm labels.

Which serious adverse events do Body Weight Changes trials report? (10)

Shown in this order: most subjects affected first. Subjects affected summed across trials, a cross-trial signal, not a rate.

Serious adverse events in this condition's trials
Adverse event Subjects affected Trials
All Fractures 860 1
Severe hypoglycemia 237 1
Congestive Heart Failure 155 3
Cardiovascular 110 3
Neoplasm progression 107 4

Which publications cover Body Weight Changes? (1)

Shown in this order: major-topic papers first, then newest, then most linked to trials.

Publications
Publication Journal Year Major topic
A prospective study of weight change and health-related quality of life in women. JAMA 1999 Yes

Sub-conditions in MeSH (3)

MeSH descendants one level down with at least one trial, most trials first.

Not on this page

Not measured: delivery record.

Checked, with nothing recorded for this condition: prevalence and rare-disease identity.

Browse all condition evidence pages