Agent skill

Case Control Study Quality Assessment Nos

by aipoch in aipoch/medical-research-skills

Clinical Research Bias Assessment - Case-Control Study (NOS) v2.3.0.

MITAuto-check passedResearch & Science

Install Case Control Study Quality Assessment Nos

skills CLI
$ npx skills add aipoch/medical-research-skills --skill case-control-study-quality-assessment-nos -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install aipoch/medical-research-skills case-control-study-quality-assessment-nos --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/aipoch/medical-research-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/'scientific-skills/Data Analysis/Case-control-study-quality-assessment-nos' .claude/skills/case-control-study-quality-assessment-nos && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
case-control-study-quality-assessment-nos
GitHub stars
1.9k
Token cost
~1.9k tokens
SKILL.md length
859 words
Files
3
Skills in repo
578
Repo updated
First seen
Licence
MIT

At a glance

Clinical Research Bias Assessment - Case-Control Study (NOS) v2.3.0.

  • Works in 4 steps: Selection Evaluation → Comparability Evaluation → Exposure Evaluation → …
  • You need to assess the bias of a case-control study using the Newcastle-Ottawa Scale (NOS) criteria
  • SKILL.md covers When to Use, Key Features, Dependencies and Example Usage, plus 13 more sections
  • Calls python

What it does

Case Control Study Quality Assessment Nos is an agent skill from aipoch/medical-research-skills. Clinical Research Bias Assessment - Case-Control Study (NOS) v2.3.0. Use when you need to assess the bias of a case-control study using the Newcastle-Ottawa Scale (NOS) criteria, or when evaluating the quality of a medical paper.

Its SKILL.md is about 1.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `POLISH_CHANGELOG.md` and `eval_report_case-control-study-quality-assessment-nos_result.json`).

It sits in Research & Science, covering Clinical and healthcare research. The repository describes itself as: Hundreds of agent skills for medical research, including protocol design, data analysis, evidence insights, and academic writing. The licence is MIT.

When your agent uses it

  • You need to assess the bias of a case-control study using the Newcastle-Ottawa Scale (NOS) criteria
  • Evaluating the quality of a medical paper

Example prompts

  • “/case-control-study-quality-assessment-nos”

Requirements

  • Python 3

Workflow steps

4 steps, taken from the step headings in SKILL.md.

  1. Selection Evaluation
  2. Comparability Evaluation
  3. Exposure Evaluation
  4. Generate Summary Table

What it can do on your machine

Read from SKILL.md and the folder at commit 686e09d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • python

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Case Control Study Quality Assessment Nos loads about 1.9k tokens when it runs. Until then it costs about 68 tokens; SKILL.md has 859 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~68
When it runs · the whole SKILL.md, loaded when a task matches
~1.9k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from aipoch/medical-research-skills at commit 686e09d, republished under its MIT licence (© aipoch). 859 words, ~1,871 tokens.

Download SKILL.mdSave it as .claude/skills/case-control-study-quality-assessment-nos/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
case-control-study-quality-assessment-nos
description
Clinical Research Bias Assessment - Case-Control Study (NOS) v2.3.0. Use when you need to assess the bias of a case-control study using the Newcastle-Ottawa Scale (NOS) criteria, or when evaluating the quality of a medical paper.
license
MIT
author
AIPOCH

Source: https://github.com/aipoch/medical-research-skills

Clinical Research Bias Assessment (NOS)

This skill evaluates the quality of case-control studies based on the Newcastle-Ottawa Scale (NOS).

When to Use

  • Use this skill when the request matches its documented task boundary.
  • Use it when the user can provide the required inputs and expects a structured deliverable.
  • Prefer this skill for repeatable, checklist-driven execution rather than open-ended brainstorming.

Key Features

  • Scope-focused workflow aligned to: Clinical Research Bias Assessment - Case-Control Study (NOS) v2.3.0. Use when you need to assess the bias of a case-control study using the Newcastle-Ottawa Scale (NOS) criteria, or when evaluating the quality of a medical paper.
  • Packaged executable path(s): scripts/extract_pdf.py plus 1 additional script(s).
  • Reference material available in references/ for task-specific guidance.
  • Structured execution path designed to keep outputs consistent and reviewable.

Dependencies

  • Python: 3.10+. Repository baseline for current packaged skills.
  • Third-party packages: not explicitly version-pinned in this skill package. Add pinned versions if this skill needs stricter environment control.

Example Usage

See ## Usage above for related details.

bash
cd "20260316/scientific-skills/Data Analytics/Case-control-study-quality-assessment-nos"
python -m py_compile scripts/extract_pdf.py
python scripts/extract_pdf.py --help

Example run plan:

  1. Confirm the user input, output path, and any required config values.
  2. Edit the in-file CONFIG block or documented parameters if the script uses fixed settings.
  3. Run python scripts/extract_pdf.py with the validated inputs.
  4. Review the generated output and return the final artifact with any assumptions called out.

Implementation Details

  • Execution model: validate the request, choose the packaged workflow, and produce a bounded deliverable.
  • Input controls: confirm the source files, scope limits, output format, and acceptance criteria before running any script.
  • Primary implementation surface: scripts/extract_pdf.py with additional helper scripts under scripts/.
  • Reference guidance: references/ contains supporting rules, prompts, or checklists.
  • Parameters to clarify first: input path, output path, scope filters, thresholds, and any domain-specific constraints.
  • Output discipline: keep results reproducible, identify assumptions explicitly, and avoid undocumented side effects.

Usage

  1. Extract Metadata: Identify the study's first author and publication year.
  2. Evaluate Criteria: Assess the study against the three NOS domains:
    • Selection: Case definition, representativeness, control selection, and definition.
    • Comparability: Comparability of cases and controls (age, other factors).
    • Exposure: Ascertainment of exposure, method of ascertainment, and non-response rate.
  3. Synthesize Results: Aggregate the evaluations into a structured JSON format.
  4. Format Output: Use scripts/format_nos_table.py to generate the final summary table.

Detailed Workflow

Step 1: Selection Evaluation

Evaluate the "Selection" domain using the criteria detailed in references/nos_criteria_prompts.md. Ensure reasons are provided in Chinese and quote the original text.

Step 2: Comparability Evaluation

Evaluate the "Comparability" domain. Note: If the odds ratio is adjusted for confounders, groups are considered comparable.

Step 3: Exposure Evaluation

Evaluate the "Exposure" domain.

Step 4: Generate Summary Table

Run the formatting script with the aggregated JSON data:

bash
python scripts/format_nos_table.py '<json_string>'

Input Validation

This skill accepts requests that match the documented purpose of case-control-study-quality-assessment-nos and include enough context to complete the workflow safely.

Do not continue the workflow when the request is out of scope, missing a critical input, or would require unsupported assumptions. Instead respond:

case-control-study-quality-assessment-nos only handles its documented workflow. Please provide the missing required inputs or switch to a more suitable skill.

References

Helper Scripts

Show full SKILL.md (350 more words)Show less
PDF Text Extraction

When the user provides a PDF file path, use scripts/extract_pdf.py to extract the text content before assessment:

When Not to Use

  • Do not use this skill when the required source data, identifiers, files, or credentials are missing.
  • Do not use this skill when the user asks for fabricated results, unsupported claims, or out-of-scope conclusions.
  • Do not use this skill when a simpler direct answer is more appropriate than the documented workflow.

Required Inputs

  • A clearly specified task goal aligned with the documented scope.
  • All required files, identifiers, parameters, or environment variables before execution.
  • Any domain constraints, formatting requirements, and expected output destination if applicable.
  1. Validate the request against the skill boundary and confirm all required inputs are present.
  2. Select the documented execution path and prefer the simplest supported command or procedure.
  3. Produce the expected output using the documented file format, schema, or narrative structure.
  4. Run a final validation pass for completeness, consistency, and safety before returning the result.

Output Contract

  • Return a structured deliverable that is directly usable without reformatting.
  • If a file is produced, prefer a deterministic output name such as case_control_study_quality_assessment_nos_result.md unless the skill documentation defines a better convention.
  • Include a short validation summary describing what was checked, what assumptions were made, and any remaining limitations.

Validation and Safety Rules

  • Validate required inputs before execution and stop early when mandatory fields or files are missing.
  • Do not fabricate measurements, references, findings, or conclusions that are not supported by the provided source material.
  • Emit a clear warning when credentials, privacy constraints, safety boundaries, or unsupported requests affect the result.
  • Keep the output safe, reproducible, and within the documented scope at all times.

Failure Handling

  • If validation fails, explain the exact missing field, file, or parameter and show the minimum fix required.
  • If an external dependency or script fails, surface the command path, likely cause, and the next recovery step.
  • If partial output is returned, label it clearly and identify which checks could not be completed.

Quick Validation

Run this minimal verification path before full execution when possible:

bash
python scripts/extract_pdf.py --help

Expected output format:

text
Result file: case_control_study_quality_assessment_nos_result.md
Validation summary: PASS/FAIL with brief notes
Assumptions: explicit list if any

© aipoch, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files in scientific-skills/Data Analysis/Case-control-study-quality-assessment-nos of aipoch/medical-research-skills.

  • SKILL.md
  • POLISH_CHANGELOG.md
  • eval_report_case-control-study-quality-assessment-nos_result.json

Open the folder on GitHubat commit 686e09d

Compare with similar skills

Case Control Study Quality Assessment Nos next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Case Control Study Quality Assessment Nos compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Case Control Study Quality Assessment Nos this skillaipoch/medical-research-skills1.9k—~1.9kAutomated safety check: PassMIT
Clinical Trials Databasegoogle-deepmind/science-skills3.2k2 repos~3.2kAutomated safety check: PassApache-2.0
CHARLS Paper Reproduction Guidexjtulyc/MedgeClaw6171 repos~1.8kAutomated safety check: PassNone
Biomedical Analysis Dispatchxjtulyc/MedgeClaw6171 repos~2kAutomated safety check: PassNone
Research Paperluwill/research-skills860—~1.9kAutomated safety check: PassNone
Research Proposalluwill/research-skills860—~4.5kAutomated safety check: NotesNone

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Questions about Case Control Study Quality Assessment Nos

What does Case Control Study Quality Assessment Nos do?

Clinical Research Bias Assessment - Case-Control Study (NOS) v2.3.0. Case Control Study Quality Assessment Nos is an agent skill from aipoch/medical-research-skills.0.

When should I use Case Control Study Quality Assessment Nos?

Case Control Study Quality Assessment Nos fits situations like: you need to assess the bias of a case-control study using the Newcastle-Ottawa Scale (NOS) criteria; evaluating the quality of a medical paper.

How do I install Case Control Study Quality Assessment Nos in Claude Code?

Run `npx skills add aipoch/medical-research-skills --skill case-control-study-quality-assessment-nos -a claude-code`. Or copy the skill folder (scientific-skills/Data Analysis/Case-control-study-quality-assessment-nos in aipoch/medical-research-skills) into .claude/skills/case-control-study-quality-assessment-nos in your project. Claude Code loads it when a task matches its description.

How do I install Case Control Study Quality Assessment Nos in Codex?

Run `npx skills add aipoch/medical-research-skills --skill case-control-study-quality-assessment-nos -a codex`. Or copy the skill folder (scientific-skills/Data Analysis/Case-control-study-quality-assessment-nos in aipoch/medical-research-skills) into .agents/skills/case-control-study-quality-assessment-nos in your project. Codex loads it when a task matches its description.

Can I use Case Control Study Quality Assessment Nos in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add aipoch/medical-research-skills --skill case-control-study-quality-assessment-nos -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/case-control-study-quality-assessment-nos, .gemini/skills/case-control-study-quality-assessment-nos, .github/skills/case-control-study-quality-assessment-nos and .opencode/skills/case-control-study-quality-assessment-nos in your project.

What does Case Control Study Quality Assessment Nos need to run?

Going by SKILL.md and its folder, Case Control Study Quality Assessment Nos needs the command-line tools its instructions call (python). Our summary lists: Python 3.

Does Case Control Study Quality Assessment Nos access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Case Control Study Quality Assessment Nos safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Case Control Study Quality Assessment Nos use?

Case Control Study Quality Assessment Nos is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Case Control Study Quality Assessment Nos use?

About 1.9k tokens (SKILL.md is roughly 7.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Case Control Study Quality Assessment Nos?

Skills that share tags, products or a category with Case Control Study Quality Assessment Nos: Clinical Trials Database (google-deepmind/science-skills, 3.2k stars), CHARLS Paper Reproduction Guide (xjtulyc/MedgeClaw, 617 stars), Biomedical Analysis Dispatch (xjtulyc/MedgeClaw, 617 stars) and Research Paper (luwill/research-skills, 860 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Case Control Study Quality Assessment Nos?

aipoch (a GitHub organization) maintains it in aipoch/medical-research-skills, which has 1,937 GitHub stars. The repository holds 578 skills in this directory. The repository was last updated on September 17, 2026.

Source: aipoch/medical-research-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.