TY - JOUR
T1 - Statistical analysis plan for the Head Position in Stroke Trial (HeadPoST)
T2 - An international cluster cross-over randomized trial
AU - Billot, Laurent
AU - Woodward, Mark
AU - Arima, Hisatomi
AU - Hackett, Maree L.
AU - Muñoz Venturelli, Paula
AU - Lavados, Pablo M
AU - Brunser, Alejandro M
AU - Peng, Bin
AU - Cui, Liying
AU - Song, Lily
AU - Heritier, Stephane
AU - Jan, Stephen
AU - Middleton, Sandy
AU - Olavarría, Verónica V.
AU - Lim, Joyce Y K
AU - Robinson, Thompson
AU - Pontes-Neto, Octavio Marques
AU - Watkins, Caroline L
AU - Anderson, Craig S
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Background: There is evidence to indicate that the lying flat head position increases cerebral blood flow and oxygenation in patients with acute ischemic stroke, but how these physiological effects translate into clinical outcomes is uncertain. The Head Position in Stroke Trial aims to determine the comparative effectiveness of lying flat (0°) compared to sitting up (≥30°) head positioning, initiated within 24 h of hospital admission for patients with acute stroke. Design: An international, pragmatic, cluster-randomized, crossover, open, blinded outcome assessed clinical trial. Each hospital with an established acute stroke unit (cluster) site was required to recruit up to 140 consecutive cases of acute stroke (one phase of head positioning before immediately crossing over to the other phase of head positioning), including both acute ischemic stroke and intracerebral hemorrhage, in each randomized head position as a ‘business as usual’ policy. Objective: To outline in detail the predetermined statistical analysis plan for the study. Methods: All accumulated data will be reviewed and formally assessed. Information regarding baseline characteristics of patients, their process of care and management will be outlined, and for each item, statistically relevant descriptive elements will be described. For the trial outcomes, the most appropriate statistical comparisons are described. Results: A statistical analysis plan was developed that is transparent, verifiable, and predetermined before completion of data collection. Conclusions: We developed a predetermined statistical analysis plan for Head Position in Stroke Trial to avoid analysis bias arising from prior knowledge of the findings, in order to reliably quantify the benefits and harms of lying flat versus sitting up early after the onset of acute stroke. Trial registration: ClinicalTrials.gov identifier NCT02162017; ANZCTR identifier ACTRN12614000483651.
AB - Background: There is evidence to indicate that the lying flat head position increases cerebral blood flow and oxygenation in patients with acute ischemic stroke, but how these physiological effects translate into clinical outcomes is uncertain. The Head Position in Stroke Trial aims to determine the comparative effectiveness of lying flat (0°) compared to sitting up (≥30°) head positioning, initiated within 24 h of hospital admission for patients with acute stroke. Design: An international, pragmatic, cluster-randomized, crossover, open, blinded outcome assessed clinical trial. Each hospital with an established acute stroke unit (cluster) site was required to recruit up to 140 consecutive cases of acute stroke (one phase of head positioning before immediately crossing over to the other phase of head positioning), including both acute ischemic stroke and intracerebral hemorrhage, in each randomized head position as a ‘business as usual’ policy. Objective: To outline in detail the predetermined statistical analysis plan for the study. Methods: All accumulated data will be reviewed and formally assessed. Information regarding baseline characteristics of patients, their process of care and management will be outlined, and for each item, statistically relevant descriptive elements will be described. For the trial outcomes, the most appropriate statistical comparisons are described. Results: A statistical analysis plan was developed that is transparent, verifiable, and predetermined before completion of data collection. Conclusions: We developed a predetermined statistical analysis plan for Head Position in Stroke Trial to avoid analysis bias arising from prior knowledge of the findings, in order to reliably quantify the benefits and harms of lying flat versus sitting up early after the onset of acute stroke. Trial registration: ClinicalTrials.gov identifier NCT02162017; ANZCTR identifier ACTRN12614000483651.
KW - clinical trial
KW - head position
KW - ischemic stroke
KW - nursing care
KW - Stroke
KW - treatment
UR - http://www.scopus.com/inward/record.url?scp=85021072185&partnerID=8YFLogxK
U2 - 10.1177/1747493017701943
DO - 10.1177/1747493017701943
M3 - Article
AN - SCOPUS:85021072185
SN - 1747-4930
VL - 12
SP - 667
EP - 670
JO - International Journal of Stroke
JF - International Journal of Stroke
IS - 6
ER -