PMID- 26110663
OWN - NLM
STAT- MEDLINE
DCOM- 20161013
LR  - 20220311
IS  - 1528-1159 (Electronic)
IS  - 0362-2436 (Linking)
VI  - 40
IP  - 22
DP  - 2015 Nov
TI  - Responsiveness and Interpretability of the Portuguese Version of the Neck 
      Disability Index in Patients With Chronic Neck Pain Undergoing Physiotherapy.
PG  - E1180-6
LID - 10.1097/BRS.0000000000001034 [doi]
AB  - STUDY DESIGN: A prospective cohort study with a 7-week follow-up of 113 patients 
      with chronic neck pain undergoing physiotherapy. OBJECTIVE: To examine the 
      responsiveness of the Portuguese Version of the Neck Disability Index (NDI-PT), 
      and to determine the minimal clinically important difference (MCID), minimal 
      detectable change (MDC), and floor/ceiling effects. SUMMARY OF BACKGROUND DATA: 
      Studies that determine MDC and MCID are needed to provide more accurate outcome 
      evaluation and critically assess potential relevant sources for differences in 
      the minimal important change values for the NDI. METHODS: The NDI-PT was 
      administered twice: at the baseline and after 7 weeks of physiotherapy treatment. 
      A Global Transition Scale was used as an external criterion measure to 
      distinguish between improved and nonimproved patients' scores between baseline 
      and follow-up. The responsiveness of the NDI-PT was assessed through anchor-based 
      methods (correlation coefficient and receiver operating characteristics 
      curves-ROC curves). The MCID was estimated by the ROC curve method, and the MDC 
      through the standard Error of Measurement (SEM). RESULTS: The NDI-PT revealed 
      moderate responsiveness when applied to patients with chronic neck pain 
      undergoing physiotherapy (rho = 0.328 and area under the curve of 0.595, 95% 
      confidence interval: 0.484-0.706). The MDC achieved 12 points, whereas the MCID 
      was found to be 5.5 points. A complementary ROC analysis based on percentage 
      differences in NDI-PT scores from baseline revealed an optimal cutoff point of 
      27%. The optimal cutoff point was found to be dependent of disability baseline 
      scores. CONCLUSION: The NDI-PT demonstrated moderate levels of responsiveness. 
      The amount of change in questionnaire scores perceived by the patient to be 
      meaningful is smaller than the amount of change required to be statistically 95% 
      confident that score change is not just measurement error. LEVEL OF EVIDENCE: 
      N/A.
FAU - Pereira, Marta
AU  - Pereira M
AD  - *Policlinica do Satao Unip. LDA, Viseu, PortugaldaggerEscola Superior de Saude, 
      Instituto Politecnico de Setubal, Setubal, Portugaldouble daggerCentro de Medicina e 
      Reabilitacao de Alcoitao, Cascais, Portugal section signUniversidade Tecnica de Lisboa, 
      Faculdade de Motricidade Humana, CIPER, LBMF, Lisboa, Portugal.
FAU - Cruz, Eduardo Brazete
AU  - Cruz EB
FAU - Domingues, Lucia
AU  - Domingues L
FAU - Duarte, Susana
AU  - Duarte S
FAU - Carnide, Filomena
AU  - Carnide F
FAU - Fernandes, Rita
AU  - Fernandes R
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Spine (Phila Pa 1976)
JT  - Spine
JID - 7610646
SB  - IM
MH  - Adult
MH  - Aged
MH  - Chronic Pain/*therapy
MH  - Disability Evaluation
MH  - Female
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Neck Pain/*diagnosis/*therapy
MH  - Pain Measurement
MH  - *Physical Therapy Modalities
MH  - Prospective Studies
MH  - Severity of Illness Index
MH  - Treatment Outcome
EDAT- 2015/06/26 06:00
MHDA- 2016/10/14 06:00
CRDT- 2015/06/26 06:00
PHST- 2015/06/26 06:00 [entrez]
PHST- 2015/06/26 06:00 [pubmed]
PHST- 2016/10/14 06:00 [medline]
AID - 10.1097/BRS.0000000000001034 [doi]
PST - ppublish
SO  - Spine (Phila Pa 1976). 2015 Nov;40(22):E1180-6. doi: 
      10.1097/BRS.0000000000001034.