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Table 1 ICD-9 codes for defining frailty and complications

From: Impact of frailty on inpatient outcomes in thyroid cancer surgery: 10-year results from the U.S. national inpatient sample

Variable Diagnoses ICD-9
Frailty
 Malnutrition Nutritional marasmus
Other severe protein-calorie malnutrition
261, 262, 263.8, 263.9, V77.2,
 Dementia Senile dementia with delusional or depressive features
Senile dementia with delirium
290.20, 290.21, 290.3
 Severe vision impairment Profound impairment, both eyes
Moderate or severe impairment, better eye/lesser eye: profound
369.0, 369.00, 369.01, 369.03, 369.04, 369.06, 369.07, 369.08,
 Decubitus ulcer Decubitus ulcer 707.0, 707.00, 707.01, 707.02, 707.03, 707.04, 707.05, 707.06, 707.07, 707.09, 707.20, 707.21, 707.22, 707.23, 707.24, 707.25
 Urinary incontinence Incontinence without sensory awareness
Continuous leakage
788.34, 788.37
 Loss of weight Abnormal loss of weight and underweight
Feeding difficulties and mismanagement
783.2, 783.21, 783.22, 783.3
 Fecal incontinence Fecal incontinence 787.6
 Social support needs Lack of housing
Inadequate housing
Inadequate material resources
V60.0, V60.1
V60.2
 Difficulty in walking Difficulty in walking
Abnormality of gait
719.7, 781.2
 Fall Fall on stairs or steps
Fall from wheelchair
E880, E880.0, E880.1, E880.9, E884.3
Surgical complications
 Tracheostomy 519.0, 519.00, 519.01, 19.02, 519.09
 Hoarseness 784.4, 784.40, 784.41, 84.42, 784.43, 784.44, 784.49, 784.51
 Hemorrhage, hematoma, or seroma 285.1, 998.1, 998.11, 998.12, 998.13
 Cystitis 595, 595.0, 595.3, 595.4, 595.8, 595.89, 595.9
 Hypocalcemia 275.41, 275.49
 Vocal cord paresis or paralysis 478.3, 478.30, 478.31, 478.32, 478.33, 478.34
 Wound complications 998.3, 998.30, 998.31, 998.32, 998.33, 998.83
 Technical complications 998.2, 998.4, 998.5, 998.51, 998.59, 998.6, 998.7, 998.8, 998.81, 998.89, 998.9
Medical complications
 Shock 998.0
 Cardiovascular 410.0–410.9, 411.1, 411.8, 415.0, 420.0, 420.9, 421.0, 421.1, 421.9, 422.0, 422.9, 427.0–427.5, 428.0–428.9, 451.11, 997.00, 997.01, 997.02, 997.09, 997.2, 997.79
 Pulmonary 512.1, 518.4, 518.81, 518.82, 518.84, 997.3, 997.31, 97.32, 997.39
 Acute kidney injury 584.5–584.9
 Pneumonia 480,480.0, 480.1, 480.2, 480.3, 480.8, 480.9, 481, 482, 482.0, 482.1, 482.3, 482.30, 482.31, 482.32, 482.39, 482.40, 482.41, 482.42, 482.49, 482.8, 482.81, 482,82, 482.83, 482.84, 482.89, 482.9, 483, 483.1, 483.8, 484, 484.1, 484.3, 484.5, 484.6, 484.7, 484.8, 485, 487.0, V12.61, 507.0, 514, 518.4, 518.5, 516, 516.8, 997.31
 Infection / Sepsis 038.0–038.9, 519.2, 785.52, 995.9, 996.31, 996.62, 996.64, 999.3, 998.5, 998.51, 998.59, 599.0, V13.02