TY - JOUR
T1 - Physical Therapy and Hospitalization among Medicare Beneficiaries with Low Back Pain
T2 - A Retrospective Cohort Study
AU - de Heer, Hendrik D.
AU - Warren, Meghan
PY - 2016/3/18
Y1 - 2016/3/18
N2 - STUDY DESIGN.: Retrospective cohort study. OBJECTIVE.: To evaluate associations between receipt and quantity of outpatient Physical Therapy (PT) during an episode of care and 30-day and 180-day hospital admissions for any condition and lumbar spine conditions. SUMMARY OF BACKGROUND DATA.: Low back pain (LBP) is a common cause of hospitalization and the most common reason Medicare beneficiaries utilize outpatient PT. The association between PT and hospitalization among patients with LBP is unknown. METHODS.: A national sample of Medicare Fee-for-Service claims included 413,608 beneficiaries with an ICD-9 code of LBP and 1,415,037 episodes of care between June 1 2010 and June 30 2011. Episodes were classified as PT episodes or non-PT episodes. Relative risk of hospitalization from the episode start date was calculated, adjusting for health status (Charlson co-morbidity index), an indicator of LBP severity (number of LBP ICD-9 codes) and demographics (sex, ethnicity, age). RESULTS.: The proportion of 30-day hospitalization for any condition was 3.42% for PT episodes of care, and 6.54% for non-PT episodes. For 180-day hospitalization, proportions were 15.45% (PT) and 21.65% (non-PT). The adjusted relative risk reduction of PT (vs. non-PT) was 41% for 30-days (99% CI 38%, 44%) and 22% for 180-days (20%, 24%). For admitting diagnoses of lumbar spine, reductions were 65% at 30-days and 32% at 180-days. More PT treatment days showed greater 30-day risk reductions. For any condition, compared to non-PT, reductions were 24% for 1-2 treatment days (lowest tertile), 45% for 3–7 days, and 65% for 8+ days (highest tertile). Stronger effects were found for lumbar spine admissions. Associations between PT quantity and 180-day hospitalization were less consistent. Limitations of Medicare claims include the potential for inaccuracies, limited knowledge about disease severity and which PT interventions were conducted. CONCLUSIONS.: Receipt of PT during an episode had a 22%-65% reduced relative risk of hospitalization, with greater short-term reductions for more PT treatment days.Level of Evidence: 3
AB - STUDY DESIGN.: Retrospective cohort study. OBJECTIVE.: To evaluate associations between receipt and quantity of outpatient Physical Therapy (PT) during an episode of care and 30-day and 180-day hospital admissions for any condition and lumbar spine conditions. SUMMARY OF BACKGROUND DATA.: Low back pain (LBP) is a common cause of hospitalization and the most common reason Medicare beneficiaries utilize outpatient PT. The association between PT and hospitalization among patients with LBP is unknown. METHODS.: A national sample of Medicare Fee-for-Service claims included 413,608 beneficiaries with an ICD-9 code of LBP and 1,415,037 episodes of care between June 1 2010 and June 30 2011. Episodes were classified as PT episodes or non-PT episodes. Relative risk of hospitalization from the episode start date was calculated, adjusting for health status (Charlson co-morbidity index), an indicator of LBP severity (number of LBP ICD-9 codes) and demographics (sex, ethnicity, age). RESULTS.: The proportion of 30-day hospitalization for any condition was 3.42% for PT episodes of care, and 6.54% for non-PT episodes. For 180-day hospitalization, proportions were 15.45% (PT) and 21.65% (non-PT). The adjusted relative risk reduction of PT (vs. non-PT) was 41% for 30-days (99% CI 38%, 44%) and 22% for 180-days (20%, 24%). For admitting diagnoses of lumbar spine, reductions were 65% at 30-days and 32% at 180-days. More PT treatment days showed greater 30-day risk reductions. For any condition, compared to non-PT, reductions were 24% for 1-2 treatment days (lowest tertile), 45% for 3–7 days, and 65% for 8+ days (highest tertile). Stronger effects were found for lumbar spine admissions. Associations between PT quantity and 180-day hospitalization were less consistent. Limitations of Medicare claims include the potential for inaccuracies, limited knowledge about disease severity and which PT interventions were conducted. CONCLUSIONS.: Receipt of PT during an episode had a 22%-65% reduced relative risk of hospitalization, with greater short-term reductions for more PT treatment days.Level of Evidence: 3
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U2 - 10.1097/BRS.0000000000001571
DO - 10.1097/BRS.0000000000001571
M3 - Article
C2 - 26998645
AN - SCOPUS:84961391702
SN - 0362-2436
JO - Spine
JF - Spine
ER -