Biomedical subjects

A Cale

Publications and source records attributed to A Cale.

4 recordsLinked to original sources

PubMed2003

Validation of four different risk stratification systems in patients undergoing off-pump coronary artery bypass surgery: a UK multicentre analysis of 2223 patients.

BACKGROUND: Various risk stratification systems have been developed in coronary artery bypass graft surgery (CABG), based mainly on patients undergoing procedures with cardiopulmonary bypass. OBJECTIVE: To assess the validity and applicability of the Parsonnet score, the EuroSCORE, the American College of Cardiology/American Heart Association (ACC/AHA) system, and the UK CABG Bayes model in patients undergoing off-pump coronary artery bypass surgery (OPCAB) in the UK. METHODS: Data on 2223 patients who underwent OPCAB in eight cardiac surgical centres were collected. Predicted mortality risk scores were calculated using the four systems and compared with observed mortality. Calibration was assessed by the Hosmer-Lemeshow (HL) test. Discrimination was assessed using the receiver operating characteristic (ROC) curve area. RESULTS: 30 of 2223 patients (1.3%) died in hospital. For the Parsonnet score the HL test was significant (p < 0.001) and the receiver operating characteristic curve (ROC) area was 0.74. For the EuroSCORE the HL test was also significant (p = 0.008) and the ROC area was 0.75. For the ACC/AHA system the HL test was non-significant (p = 0.7) and the ROC area was 0.75. For the UK CABG Bayes model the HL test was also non-significant (p = 0.3) and the ROC area was 0.81. CONCLUSIONS: The UK CABG Bayes model is reasonably well calibrated and provides good discrimination when applied to OPCAB patients in the UK. Among the other three systems, the ACC/AHA system is well calibrated but its discrimination power was less than for the UK CABG Bayes model. These data suggest that the UK CABG Bayes model could be an appropriate risk stratification system to use for patients undergoing OPCAB in the UK.

Coronary Artery Bypass↗

PubMed1997

Goal difficulty, anxiety and performance.

This study reports a detailed investigation of the interaction between goal setting, anxiety and perceptuo-motor performance. Forty-four subjects completed familiarization, control and treatment conditions in which they were required to perform a series of perceptual speed trials. In the control condition, subjects were assigned a vague, general goal of 'do your best', whilst in the treatment condition, increasingly difficult, specific goals were assigned. During each condition, subjective goal difficulty, goal acceptance, performance, cognitive anxiety, somatic anxiety and self-confidence were examined. The results suggested that the manipulation of the control and treatment conditions were successful. In the treatment condition, an increase in cognitive anxiety and a reduction in self-confidence accompanied increasing goal difficulty but these remained stable in the control condition. Performance was greater when 'do your best' as opposed to 'very easy' goals were assigned, but this situation was reversed when 'very hard' goals were assigned. The results of these laboratory-based findings are discussed with particular reference to the implications for practitioners in applied settings.

Adolescent↗

PubMed1990

Interrelationships among multidimensional competitive state anxiety components as a function of the proximity of competition.

This study examined whether the relationship between the cognitive anxiety and somatic anxiety subscales of the Competitive State Anxiety Inventory-2 changes as a function of the proximity of a competition. On five separate occasions during the period prior to an important competition 87 subjects responded to the inventory. Intercorrelations between subscale scores suggested a progressive increase in the magnitude of the relationship between cognitive and somatic anxiety as the event approached. Findings support in a sporting context the hypothesis of covariance at times of high stress.

Adult↗

PubMed1989

Relationships between multidimensional competitive state anxiety and cognitive and motor subcomponents of performance.

This study examined the relationship between multidimensional competitive state anxiety and cognitive (i.e. digit span) and motor (i.e. perceptuo-motor speed) subcomponents of performance in an experimental group of hockey players during the period leading up to an important hockey match, and also in a control group of hockey players before a routine training session. Using a 'time-to-event' experimental paradigm, an increase in somatic anxiety 20 min before the hockey match was accompanied by improved perceptuo-motor speed performance. Stepwise multiple regression analyses showed that somatic anxiety was negatively related to digit span performance, whilst somatic anxiety and self-confidence were positively related to perceptuo-motor speed performance. These findings suggest that somatic anxiety may be an important source of performance variance.

Adult↗