| Years . | Cluster ID . | Number of words . | Frequency (%) . | Examples of word list . |
|---|---|---|---|---|
| 1960s–1990s | A1 | 329 | 15.96 | activity, support, education, condition, family, characteristic, ability, belief, network, measurement |
| A2 | 273 | 13.25 | older adult, change, service, program, leisure, strategy, practice, creativity, challenge, community, concept, society, benefit, participation, movement, fitness | |
| A3 | 266 | 12.91 | performance, physical activity, brain, disability, train, growth, exercise, recovery, damage, maintenance, stress, risk factor, chronic, capacity | |
| A4 | 258 | 12.52 | health, memory, behavior, symptoms, life satisfaction, curiosity, movement, anxiety, mental health, harmony, personality | |
| A5 | 250 | 12.13 | disease, longevity, system, cognitive, blood, period, cause, cell, observation, impairment, neuron, vitamin, antioxidant, supplementation | |
| A6 | 152 | 7.38 | measure, depression, quality, sleep, bereavement, survivor, possibility | |
| A7 | 146 | 7.08 | age, heart, failure, dynamic, lose, mechanism, oxygen, intelligence, frailty, existence, culture, comorbidity, deterioration | |
| A8 | 138 | 6.7 | patient, death, dementia, thyroid, transfer, siblings, relatives, gene, hormone | |
| A9 | 103 | 5 | experience, emotion, partner, contact, knowledge, daily activity, event, resource, interaction, expectation, energy | |
| A10 | 75 | 3.64 | stability, cortisol, fracture, exposure, antibody, vaccination, virus | |
| A11 | 71 | 3.44 | use, treatment, mind-body, disorder, technique, therapy, effectiveness, physician, arthritis | |
| 2000s | B1 | 1,438 | 28.47 | process, support, program, influence, experience, use, education, value, society, community, family, ability, characteristic, quality of life, service, satisfaction, issue, strategy, successful aging, leisure, technology, cognitive, policy, social activity, mental health |
| B2 | 1,158 | 22.93 | disease, activity, longevity, system, brain, stress, cell, order, capacity, cause, gene, inflammation, determinant, disorder, immune | |
| B3 | 868 | 17.18 | change, measure, physical activity, mortality, performance, disability, memory, risk factor, blood, impairment, symptom | |
| B4 | 710 | 14.06 | health, older adult, condition, patient, death, treatment, quality, management, caregiver, morbidity, expectancy, cost, medicine, technology, healthcare, circumstance | |
| B5 | 543 | 10.75 | age, image, spirituality, youth, capital, trait, geriatrics, journey, consciousness, revolution, neurosignals, technology | |
| B6 | 285 | 5.64 | exercise, depression, marriage, market, direction, consumer, speech, movement, creativity, hear, sport | |
| B7 | 49 | 0.97 | nutrition, prevent, interaction, recommendation, future, investigation, guideline, genomic, discipline, endeavor, nutrigenetic | |
| 2010s | C1 | 3,167 | 30.92 | health, older adult, support, experience, program, education, influence, depression, activity, participation, life satisfaction, leisure, satisfaction, social activity, anxiety, loneliness, emotion |
| C2 | 2,677 | 26.13 | age, change, process, disease, longevity, exercise, brain, memory, system, stress, death, treatment, growth, cognition, disorder, technology, policy | |
| C3 | 1,920 | 18.74 | society, focus, challenge, family, strategy, gender, ability, practice, resource, successful aging, service, network, impact, issue, retirement, mental health | |
| C4 | 1,870 | 18.25 | use, measure, physical activity, disability, intervention, quality of life, frailty, questionnaire, mortality, symptoms, prevalence, impairment, dementia, nutrition | |
| C5 | 496 | 4.84 | condition, performance, resilience, train, fitness, transition, vulnerability, athlete, event, expert, physique | |
| C6 | 96 | 0.94 | parent, deterioration, clinician, hospital, admission, entry, medicare, facility, beneficiaries, traumatization | |
| C7 | 18 | 0.18 | outsider, beholder, visualize, peak, visibility, reputation, sociability | |
| 2020s | D1 | 1,548 | 20.21 | promotion, education, activity, behavior, leisure, family, participation, service, community, influence, life satisfaction, satisfaction, gratitude, emotion, volunteer |
| D2 | 1,488 | 19.43 | function, change, exercise, disease, memory, performance, brain, strength, muscle, capacity, cognitive, longevity, energy, protein | |
| D3 | 1,316 | 17.18 | older adult, health, support, use, place, mental health, intervention, technology, quality, domains, malnutrition, dementia, provider, monitor, policy | |
| D4 | 1,139 | 14.87 | age, experience, sport, dance, fitness, lifestyle, license, reproduction, medicine, athlete, recovery, wellness, choice, uncertainty, queer | |
| D5 | 995 | 12.99 | frailty, depression, resilience, vitamin, deficiency, mortality, disability, perform, impairment, multimorbidity | |
| D6 | 601 | 7.85 | physical activity, measure, delirium, surgery, patient, cost, severity, efficacy, disorder, hospitalization, intensity, medication, patient | |
| D7 | 289 | 3.77 | quality of life, transition, network, determinant, province, diagnose, pensioner | |
| D8 | 202 | 2.64 | prediction, machine, sensitivity, feature, specificity, resident, social factor, fashion, technique | |
| D9 | 81 | 1.06 | generation, insignificant, pastor, accomplishment | |
| All years (1960s–2020s) | E1 | 6,208 | 40.28 | age, health, older adult, support, experience, program, activity, education, influence, community, society, exercise, family, service, participation, life satisfaction, leisure, satisfaction, technology, anxiety, devices, expectation, gerontechnology, religiosity, coordination, clinics, home, suicide, sensor |
| E2 | 3,205 | 20.8 | change, disease, longevity, brain, system, memory, stress, death, capacity, treatment, mechanism, balance, blood, cells, protein, genes, muscle, markers | |
| E3 | 2,714 | 17.61 | measure, physical activity, performance, depression, disability, patient, mortality, frailty, questionnaire, dementia, impairment, symptom, cognition, nutrition, risk factor | |
| E4 | 2,404 | 15.6 | challenge, strategy, ability, successful aging, resources, mental health, benefit, concept, retirement, concern, independence, engagement, policy, environment | |
| E5 | 685 | 4.44 | condition, quality of life, resilience, difficulty, athletes, expert, performance, revolution, physique, movement | |
| E6 | 196 | 1.27 | network, nation, circle, Facebook |
| Years . | Cluster ID . | Number of words . | Frequency (%) . | Examples of word list . |
|---|---|---|---|---|
| 1960s–1990s | A1 | 329 | 15.96 | activity, support, education, condition, family, characteristic, ability, belief, network, measurement |
| A2 | 273 | 13.25 | older adult, change, service, program, leisure, strategy, practice, creativity, challenge, community, concept, society, benefit, participation, movement, fitness | |
| A3 | 266 | 12.91 | performance, physical activity, brain, disability, train, growth, exercise, recovery, damage, maintenance, stress, risk factor, chronic, capacity | |
| A4 | 258 | 12.52 | health, memory, behavior, symptoms, life satisfaction, curiosity, movement, anxiety, mental health, harmony, personality | |
| A5 | 250 | 12.13 | disease, longevity, system, cognitive, blood, period, cause, cell, observation, impairment, neuron, vitamin, antioxidant, supplementation | |
| A6 | 152 | 7.38 | measure, depression, quality, sleep, bereavement, survivor, possibility | |
| A7 | 146 | 7.08 | age, heart, failure, dynamic, lose, mechanism, oxygen, intelligence, frailty, existence, culture, comorbidity, deterioration | |
| A8 | 138 | 6.7 | patient, death, dementia, thyroid, transfer, siblings, relatives, gene, hormone | |
| A9 | 103 | 5 | experience, emotion, partner, contact, knowledge, daily activity, event, resource, interaction, expectation, energy | |
| A10 | 75 | 3.64 | stability, cortisol, fracture, exposure, antibody, vaccination, virus | |
| A11 | 71 | 3.44 | use, treatment, mind-body, disorder, technique, therapy, effectiveness, physician, arthritis | |
| 2000s | B1 | 1,438 | 28.47 | process, support, program, influence, experience, use, education, value, society, community, family, ability, characteristic, quality of life, service, satisfaction, issue, strategy, successful aging, leisure, technology, cognitive, policy, social activity, mental health |
| B2 | 1,158 | 22.93 | disease, activity, longevity, system, brain, stress, cell, order, capacity, cause, gene, inflammation, determinant, disorder, immune | |
| B3 | 868 | 17.18 | change, measure, physical activity, mortality, performance, disability, memory, risk factor, blood, impairment, symptom | |
| B4 | 710 | 14.06 | health, older adult, condition, patient, death, treatment, quality, management, caregiver, morbidity, expectancy, cost, medicine, technology, healthcare, circumstance | |
| B5 | 543 | 10.75 | age, image, spirituality, youth, capital, trait, geriatrics, journey, consciousness, revolution, neurosignals, technology | |
| B6 | 285 | 5.64 | exercise, depression, marriage, market, direction, consumer, speech, movement, creativity, hear, sport | |
| B7 | 49 | 0.97 | nutrition, prevent, interaction, recommendation, future, investigation, guideline, genomic, discipline, endeavor, nutrigenetic | |
| 2010s | C1 | 3,167 | 30.92 | health, older adult, support, experience, program, education, influence, depression, activity, participation, life satisfaction, leisure, satisfaction, social activity, anxiety, loneliness, emotion |
| C2 | 2,677 | 26.13 | age, change, process, disease, longevity, exercise, brain, memory, system, stress, death, treatment, growth, cognition, disorder, technology, policy | |
| C3 | 1,920 | 18.74 | society, focus, challenge, family, strategy, gender, ability, practice, resource, successful aging, service, network, impact, issue, retirement, mental health | |
| C4 | 1,870 | 18.25 | use, measure, physical activity, disability, intervention, quality of life, frailty, questionnaire, mortality, symptoms, prevalence, impairment, dementia, nutrition | |
| C5 | 496 | 4.84 | condition, performance, resilience, train, fitness, transition, vulnerability, athlete, event, expert, physique | |
| C6 | 96 | 0.94 | parent, deterioration, clinician, hospital, admission, entry, medicare, facility, beneficiaries, traumatization | |
| C7 | 18 | 0.18 | outsider, beholder, visualize, peak, visibility, reputation, sociability | |
| 2020s | D1 | 1,548 | 20.21 | promotion, education, activity, behavior, leisure, family, participation, service, community, influence, life satisfaction, satisfaction, gratitude, emotion, volunteer |
| D2 | 1,488 | 19.43 | function, change, exercise, disease, memory, performance, brain, strength, muscle, capacity, cognitive, longevity, energy, protein | |
| D3 | 1,316 | 17.18 | older adult, health, support, use, place, mental health, intervention, technology, quality, domains, malnutrition, dementia, provider, monitor, policy | |
| D4 | 1,139 | 14.87 | age, experience, sport, dance, fitness, lifestyle, license, reproduction, medicine, athlete, recovery, wellness, choice, uncertainty, queer | |
| D5 | 995 | 12.99 | frailty, depression, resilience, vitamin, deficiency, mortality, disability, perform, impairment, multimorbidity | |
| D6 | 601 | 7.85 | physical activity, measure, delirium, surgery, patient, cost, severity, efficacy, disorder, hospitalization, intensity, medication, patient | |
| D7 | 289 | 3.77 | quality of life, transition, network, determinant, province, diagnose, pensioner | |
| D8 | 202 | 2.64 | prediction, machine, sensitivity, feature, specificity, resident, social factor, fashion, technique | |
| D9 | 81 | 1.06 | generation, insignificant, pastor, accomplishment | |
| All years (1960s–2020s) | E1 | 6,208 | 40.28 | age, health, older adult, support, experience, program, activity, education, influence, community, society, exercise, family, service, participation, life satisfaction, leisure, satisfaction, technology, anxiety, devices, expectation, gerontechnology, religiosity, coordination, clinics, home, suicide, sensor |
| E2 | 3,205 | 20.8 | change, disease, longevity, brain, system, memory, stress, death, capacity, treatment, mechanism, balance, blood, cells, protein, genes, muscle, markers | |
| E3 | 2,714 | 17.61 | measure, physical activity, performance, depression, disability, patient, mortality, frailty, questionnaire, dementia, impairment, symptom, cognition, nutrition, risk factor | |
| E4 | 2,404 | 15.6 | challenge, strategy, ability, successful aging, resources, mental health, benefit, concept, retirement, concern, independence, engagement, policy, environment | |
| E5 | 685 | 4.44 | condition, quality of life, resilience, difficulty, athletes, expert, performance, revolution, physique, movement | |
| E6 | 196 | 1.27 | network, nation, circle, Facebook |
Notes: The cluster ID was assigned to differentiate the time period, and the letter or the number does not represent specific information.
| Years . | Cluster ID . | Number of words . | Frequency (%) . | Examples of word list . |
|---|---|---|---|---|
| 1960s–1990s | A1 | 329 | 15.96 | activity, support, education, condition, family, characteristic, ability, belief, network, measurement |
| A2 | 273 | 13.25 | older adult, change, service, program, leisure, strategy, practice, creativity, challenge, community, concept, society, benefit, participation, movement, fitness | |
| A3 | 266 | 12.91 | performance, physical activity, brain, disability, train, growth, exercise, recovery, damage, maintenance, stress, risk factor, chronic, capacity | |
| A4 | 258 | 12.52 | health, memory, behavior, symptoms, life satisfaction, curiosity, movement, anxiety, mental health, harmony, personality | |
| A5 | 250 | 12.13 | disease, longevity, system, cognitive, blood, period, cause, cell, observation, impairment, neuron, vitamin, antioxidant, supplementation | |
| A6 | 152 | 7.38 | measure, depression, quality, sleep, bereavement, survivor, possibility | |
| A7 | 146 | 7.08 | age, heart, failure, dynamic, lose, mechanism, oxygen, intelligence, frailty, existence, culture, comorbidity, deterioration | |
| A8 | 138 | 6.7 | patient, death, dementia, thyroid, transfer, siblings, relatives, gene, hormone | |
| A9 | 103 | 5 | experience, emotion, partner, contact, knowledge, daily activity, event, resource, interaction, expectation, energy | |
| A10 | 75 | 3.64 | stability, cortisol, fracture, exposure, antibody, vaccination, virus | |
| A11 | 71 | 3.44 | use, treatment, mind-body, disorder, technique, therapy, effectiveness, physician, arthritis | |
| 2000s | B1 | 1,438 | 28.47 | process, support, program, influence, experience, use, education, value, society, community, family, ability, characteristic, quality of life, service, satisfaction, issue, strategy, successful aging, leisure, technology, cognitive, policy, social activity, mental health |
| B2 | 1,158 | 22.93 | disease, activity, longevity, system, brain, stress, cell, order, capacity, cause, gene, inflammation, determinant, disorder, immune | |
| B3 | 868 | 17.18 | change, measure, physical activity, mortality, performance, disability, memory, risk factor, blood, impairment, symptom | |
| B4 | 710 | 14.06 | health, older adult, condition, patient, death, treatment, quality, management, caregiver, morbidity, expectancy, cost, medicine, technology, healthcare, circumstance | |
| B5 | 543 | 10.75 | age, image, spirituality, youth, capital, trait, geriatrics, journey, consciousness, revolution, neurosignals, technology | |
| B6 | 285 | 5.64 | exercise, depression, marriage, market, direction, consumer, speech, movement, creativity, hear, sport | |
| B7 | 49 | 0.97 | nutrition, prevent, interaction, recommendation, future, investigation, guideline, genomic, discipline, endeavor, nutrigenetic | |
| 2010s | C1 | 3,167 | 30.92 | health, older adult, support, experience, program, education, influence, depression, activity, participation, life satisfaction, leisure, satisfaction, social activity, anxiety, loneliness, emotion |
| C2 | 2,677 | 26.13 | age, change, process, disease, longevity, exercise, brain, memory, system, stress, death, treatment, growth, cognition, disorder, technology, policy | |
| C3 | 1,920 | 18.74 | society, focus, challenge, family, strategy, gender, ability, practice, resource, successful aging, service, network, impact, issue, retirement, mental health | |
| C4 | 1,870 | 18.25 | use, measure, physical activity, disability, intervention, quality of life, frailty, questionnaire, mortality, symptoms, prevalence, impairment, dementia, nutrition | |
| C5 | 496 | 4.84 | condition, performance, resilience, train, fitness, transition, vulnerability, athlete, event, expert, physique | |
| C6 | 96 | 0.94 | parent, deterioration, clinician, hospital, admission, entry, medicare, facility, beneficiaries, traumatization | |
| C7 | 18 | 0.18 | outsider, beholder, visualize, peak, visibility, reputation, sociability | |
| 2020s | D1 | 1,548 | 20.21 | promotion, education, activity, behavior, leisure, family, participation, service, community, influence, life satisfaction, satisfaction, gratitude, emotion, volunteer |
| D2 | 1,488 | 19.43 | function, change, exercise, disease, memory, performance, brain, strength, muscle, capacity, cognitive, longevity, energy, protein | |
| D3 | 1,316 | 17.18 | older adult, health, support, use, place, mental health, intervention, technology, quality, domains, malnutrition, dementia, provider, monitor, policy | |
| D4 | 1,139 | 14.87 | age, experience, sport, dance, fitness, lifestyle, license, reproduction, medicine, athlete, recovery, wellness, choice, uncertainty, queer | |
| D5 | 995 | 12.99 | frailty, depression, resilience, vitamin, deficiency, mortality, disability, perform, impairment, multimorbidity | |
| D6 | 601 | 7.85 | physical activity, measure, delirium, surgery, patient, cost, severity, efficacy, disorder, hospitalization, intensity, medication, patient | |
| D7 | 289 | 3.77 | quality of life, transition, network, determinant, province, diagnose, pensioner | |
| D8 | 202 | 2.64 | prediction, machine, sensitivity, feature, specificity, resident, social factor, fashion, technique | |
| D9 | 81 | 1.06 | generation, insignificant, pastor, accomplishment | |
| All years (1960s–2020s) | E1 | 6,208 | 40.28 | age, health, older adult, support, experience, program, activity, education, influence, community, society, exercise, family, service, participation, life satisfaction, leisure, satisfaction, technology, anxiety, devices, expectation, gerontechnology, religiosity, coordination, clinics, home, suicide, sensor |
| E2 | 3,205 | 20.8 | change, disease, longevity, brain, system, memory, stress, death, capacity, treatment, mechanism, balance, blood, cells, protein, genes, muscle, markers | |
| E3 | 2,714 | 17.61 | measure, physical activity, performance, depression, disability, patient, mortality, frailty, questionnaire, dementia, impairment, symptom, cognition, nutrition, risk factor | |
| E4 | 2,404 | 15.6 | challenge, strategy, ability, successful aging, resources, mental health, benefit, concept, retirement, concern, independence, engagement, policy, environment | |
| E5 | 685 | 4.44 | condition, quality of life, resilience, difficulty, athletes, expert, performance, revolution, physique, movement | |
| E6 | 196 | 1.27 | network, nation, circle, Facebook |
| Years . | Cluster ID . | Number of words . | Frequency (%) . | Examples of word list . |
|---|---|---|---|---|
| 1960s–1990s | A1 | 329 | 15.96 | activity, support, education, condition, family, characteristic, ability, belief, network, measurement |
| A2 | 273 | 13.25 | older adult, change, service, program, leisure, strategy, practice, creativity, challenge, community, concept, society, benefit, participation, movement, fitness | |
| A3 | 266 | 12.91 | performance, physical activity, brain, disability, train, growth, exercise, recovery, damage, maintenance, stress, risk factor, chronic, capacity | |
| A4 | 258 | 12.52 | health, memory, behavior, symptoms, life satisfaction, curiosity, movement, anxiety, mental health, harmony, personality | |
| A5 | 250 | 12.13 | disease, longevity, system, cognitive, blood, period, cause, cell, observation, impairment, neuron, vitamin, antioxidant, supplementation | |
| A6 | 152 | 7.38 | measure, depression, quality, sleep, bereavement, survivor, possibility | |
| A7 | 146 | 7.08 | age, heart, failure, dynamic, lose, mechanism, oxygen, intelligence, frailty, existence, culture, comorbidity, deterioration | |
| A8 | 138 | 6.7 | patient, death, dementia, thyroid, transfer, siblings, relatives, gene, hormone | |
| A9 | 103 | 5 | experience, emotion, partner, contact, knowledge, daily activity, event, resource, interaction, expectation, energy | |
| A10 | 75 | 3.64 | stability, cortisol, fracture, exposure, antibody, vaccination, virus | |
| A11 | 71 | 3.44 | use, treatment, mind-body, disorder, technique, therapy, effectiveness, physician, arthritis | |
| 2000s | B1 | 1,438 | 28.47 | process, support, program, influence, experience, use, education, value, society, community, family, ability, characteristic, quality of life, service, satisfaction, issue, strategy, successful aging, leisure, technology, cognitive, policy, social activity, mental health |
| B2 | 1,158 | 22.93 | disease, activity, longevity, system, brain, stress, cell, order, capacity, cause, gene, inflammation, determinant, disorder, immune | |
| B3 | 868 | 17.18 | change, measure, physical activity, mortality, performance, disability, memory, risk factor, blood, impairment, symptom | |
| B4 | 710 | 14.06 | health, older adult, condition, patient, death, treatment, quality, management, caregiver, morbidity, expectancy, cost, medicine, technology, healthcare, circumstance | |
| B5 | 543 | 10.75 | age, image, spirituality, youth, capital, trait, geriatrics, journey, consciousness, revolution, neurosignals, technology | |
| B6 | 285 | 5.64 | exercise, depression, marriage, market, direction, consumer, speech, movement, creativity, hear, sport | |
| B7 | 49 | 0.97 | nutrition, prevent, interaction, recommendation, future, investigation, guideline, genomic, discipline, endeavor, nutrigenetic | |
| 2010s | C1 | 3,167 | 30.92 | health, older adult, support, experience, program, education, influence, depression, activity, participation, life satisfaction, leisure, satisfaction, social activity, anxiety, loneliness, emotion |
| C2 | 2,677 | 26.13 | age, change, process, disease, longevity, exercise, brain, memory, system, stress, death, treatment, growth, cognition, disorder, technology, policy | |
| C3 | 1,920 | 18.74 | society, focus, challenge, family, strategy, gender, ability, practice, resource, successful aging, service, network, impact, issue, retirement, mental health | |
| C4 | 1,870 | 18.25 | use, measure, physical activity, disability, intervention, quality of life, frailty, questionnaire, mortality, symptoms, prevalence, impairment, dementia, nutrition | |
| C5 | 496 | 4.84 | condition, performance, resilience, train, fitness, transition, vulnerability, athlete, event, expert, physique | |
| C6 | 96 | 0.94 | parent, deterioration, clinician, hospital, admission, entry, medicare, facility, beneficiaries, traumatization | |
| C7 | 18 | 0.18 | outsider, beholder, visualize, peak, visibility, reputation, sociability | |
| 2020s | D1 | 1,548 | 20.21 | promotion, education, activity, behavior, leisure, family, participation, service, community, influence, life satisfaction, satisfaction, gratitude, emotion, volunteer |
| D2 | 1,488 | 19.43 | function, change, exercise, disease, memory, performance, brain, strength, muscle, capacity, cognitive, longevity, energy, protein | |
| D3 | 1,316 | 17.18 | older adult, health, support, use, place, mental health, intervention, technology, quality, domains, malnutrition, dementia, provider, monitor, policy | |
| D4 | 1,139 | 14.87 | age, experience, sport, dance, fitness, lifestyle, license, reproduction, medicine, athlete, recovery, wellness, choice, uncertainty, queer | |
| D5 | 995 | 12.99 | frailty, depression, resilience, vitamin, deficiency, mortality, disability, perform, impairment, multimorbidity | |
| D6 | 601 | 7.85 | physical activity, measure, delirium, surgery, patient, cost, severity, efficacy, disorder, hospitalization, intensity, medication, patient | |
| D7 | 289 | 3.77 | quality of life, transition, network, determinant, province, diagnose, pensioner | |
| D8 | 202 | 2.64 | prediction, machine, sensitivity, feature, specificity, resident, social factor, fashion, technique | |
| D9 | 81 | 1.06 | generation, insignificant, pastor, accomplishment | |
| All years (1960s–2020s) | E1 | 6,208 | 40.28 | age, health, older adult, support, experience, program, activity, education, influence, community, society, exercise, family, service, participation, life satisfaction, leisure, satisfaction, technology, anxiety, devices, expectation, gerontechnology, religiosity, coordination, clinics, home, suicide, sensor |
| E2 | 3,205 | 20.8 | change, disease, longevity, brain, system, memory, stress, death, capacity, treatment, mechanism, balance, blood, cells, protein, genes, muscle, markers | |
| E3 | 2,714 | 17.61 | measure, physical activity, performance, depression, disability, patient, mortality, frailty, questionnaire, dementia, impairment, symptom, cognition, nutrition, risk factor | |
| E4 | 2,404 | 15.6 | challenge, strategy, ability, successful aging, resources, mental health, benefit, concept, retirement, concern, independence, engagement, policy, environment | |
| E5 | 685 | 4.44 | condition, quality of life, resilience, difficulty, athletes, expert, performance, revolution, physique, movement | |
| E6 | 196 | 1.27 | network, nation, circle, Facebook |
Notes: The cluster ID was assigned to differentiate the time period, and the letter or the number does not represent specific information.
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