{
    "info": {
        "nct_id": "NCT06162962",
        "official_title": "Department of Orthopedic Oncology, The First Affiliated Hospital of Sun Yat-sen University",
        "inclusion_criteria": "1. Diagnosed lower limb osteosarcoma patients under the age of 14;\n2. Performing tumor resection treatment in our hospital;\n3. There is complete clinical registration data available.\nHealthy volunteers allowed\nMust have minimum age of 4 Years\nMust have maximum age of 14 Years",
        "exclusion_criteria": "1. Not undergoing surgical treatment in our hospital;\n2. Age older than 14 years old;\n3. No available clinical registration data or lost follow-up patients;\n4. Non lower limb osteosarcoma patients.",
        "miscellaneous_criteria": ""
    },
    "inclusion_lines": [
        {
            "line": "1. Diagnosed lower limb osteosarcoma patients under the age of 14;",
            "criterions": [
                {
                    "exact_snippets": "Diagnosed lower limb osteosarcoma",
                    "criterion": "lower limb osteosarcoma",
                    "requirements": [
                        {
                            "requirement_type": "diagnosis",
                            "expected_value": true
                        }
                    ]
                },
                {
                    "exact_snippets": "under the age of 14",
                    "criterion": "age",
                    "requirements": [
                        {
                            "requirement_type": "maximum",
                            "expected_value": {
                                "operator": "<",
                                "value": 14,
                                "unit": "years"
                            }
                        }
                    ]
                }
            ]
        },
        {
            "line": "2. Performing tumor resection treatment in our hospital;",
            "criterions": [
                {
                    "exact_snippets": "Performing tumor resection treatment",
                    "criterion": "tumor resection treatment",
                    "requirements": [
                        {
                            "requirement_type": "location",
                            "expected_value": "our hospital"
                        }
                    ]
                }
            ]
        },
        {
            "line": "3. There is complete clinical registration data available.",
            "criterions": [
                {
                    "exact_snippets": "complete clinical registration data available",
                    "criterion": "clinical registration data",
                    "requirements": [
                        {
                            "requirement_type": "availability",
                            "expected_value": true
                        },
                        {
                            "requirement_type": "completeness",
                            "expected_value": true
                        }
                    ]
                }
            ]
        },
        {
            "line": "Healthy volunteers allowed",
            "criterions": [
                {
                    "exact_snippets": "Healthy volunteers allowed",
                    "criterion": "volunteer health status",
                    "requirements": [
                        {
                            "requirement_type": "status",
                            "expected_value": "healthy"
                        }
                    ]
                }
            ]
        },
        {
            "line": "Must have minimum age of 4 Years",
            "criterions": [
                {
                    "exact_snippets": "minimum age of 4 Years",
                    "criterion": "age",
                    "requirements": [
                        {
                            "requirement_type": "minimum",
                            "expected_value": {
                                "operator": ">=",
                                "value": 4,
                                "unit": "Years"
                            }
                        }
                    ]
                }
            ]
        },
        {
            "line": "Must have maximum age of 14 Years",
            "criterions": [
                {
                    "exact_snippets": "maximum age of 14 Years",
                    "criterion": "age",
                    "requirements": [
                        {
                            "requirement_type": "maximum",
                            "expected_value": {
                                "operator": "<=",
                                "value": 14,
                                "unit": "Years"
                            }
                        }
                    ]
                }
            ]
        }
    ],
    "exclusion_lines": [
        {
            "line": "1. Not undergoing surgical treatment in our hospital;",
            "criterions": [
                {
                    "exact_snippets": "Not undergoing surgical treatment in our hospital",
                    "criterion": "surgical treatment location",
                    "requirements": [
                        {
                            "requirement_type": "location",
                            "expected_value": "not in our hospital"
                        }
                    ]
                }
            ]
        },
        {
            "line": "2. Age older than 14 years old;",
            "criterions": [
                {
                    "exact_snippets": "Age older than 14 years old",
                    "criterion": "age",
                    "requirements": [
                        {
                            "requirement_type": "value",
                            "expected_value": {
                                "operator": ">",
                                "value": 14,
                                "unit": "years"
                            }
                        }
                    ]
                }
            ]
        },
        {
            "line": "3. No available clinical registration data or lost follow-up patients;",
            "criterions": [
                {
                    "exact_snippets": "No available clinical registration data",
                    "criterion": "clinical registration data",
                    "requirements": [
                        {
                            "requirement_type": "availability",
                            "expected_value": false
                        }
                    ]
                },
                {
                    "exact_snippets": "lost follow-up patients",
                    "criterion": "follow-up status",
                    "requirements": [
                        {
                            "requirement_type": "status",
                            "expected_value": "not lost"
                        }
                    ]
                }
            ]
        },
        {
            "line": "4. Non lower limb osteosarcoma patients.",
            "criterions": [
                {
                    "exact_snippets": "Non lower limb osteosarcoma patients",
                    "criterion": "osteosarcoma location",
                    "requirements": [
                        {
                            "requirement_type": "location",
                            "expected_value": "non-lower limb"
                        }
                    ]
                }
            ]
        }
    ],
    "miscellaneous_lines": [],
    "failed_inclusion": [],
    "failed_exclusion": [],
    "failed_miscellaneous": []
}