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Biomedical subjects

C K van der Ent

Publications and source records attributed to C K van der Ent.

40 records · Page 3Linked to original sources
PubMed1987

The stability of the A-Trait subscale of the STAI for stress and passage of time.

One hundred and eighty-eight surgical patients completed the A-Trait subscale of a Dutch version of the State-Trait Anxiety Inventory (STAI-DY) on the day before the operation and again 3 days later. A-Trait total-scores were significantly lower in the second measurement (p less than .01), and weighted kappa techniques showed disagreement in 8 of 20 pre-postsurgery items. Nine to 12 months postsurgery, 90 patients completed the measure again. Total-scores in session 3 were significantly higher than in session 2 (p less than .02), and 15 items showed disagreement between both sessions, with more agreement in Anxiety-present than in Anxiety-absent items. The ranges of the A-Trait score-changes between the different sessions turned out to be rather wide. These results indicate some instability of the A-Trait subscale of the STAI and argue for a cautious interpretation of individual scores.

Adolescent↗
PubMed1986

[Postanesthetic recall ability, anxiety and dreams in surgical patients. A clinical study].

The recall of stimuli registered during general anaesthesia is described. Patients were interviewed 2 days after surgery, concerning their experiences during anaesthesia. In a second series of observations, the interview was preceded by a short inquiry, which took place in the recovery room as soon as the patient awoke. Anxiety was also assessed by pre- and postoperative tests. Of 140 patients, 2 described recall of awareness during anaesthesia. There was no evidence that external stimuli had been incorporated into dream content.

Adolescent↗
PubMedDate not supplied

The diagnostic and screening capacities of peak expiratory flow measurements in the assessment of airway obstruction and bronchodilator response in children with asthma.

Although the measurement of peak expiratory flow (PEF) is frequently used in general practice as a surrogate for forced expiratory volume in one second (FEV1) in the assessment of airway obstruction and bronchodilator response (BDR), its use has never been validated in children with asthma. Spirometry and PEF measurements (mini-Wright peak flow meter) were performed in 271 children with asthma who attended the hospital for a routine pulmonary evaluation. Airway obstruction was defined as FEV1 as a percentage of predicted (FEV1% pred) < 80%; a positive BDR was defined as an increase in FEV1% pred > or 9% after inhaling 800 micrograms salbutamol. The Spearman correlation coefficient between the percent-predicted values of PEF (PEF% pred) and FEV1% pred was 0.36, Commonly used cut off values for airway obstruction of PEF% pred < 75% and PEF% pred < 80% had a high specificity (95%, 91%) and NPV (95%, 95%), but a moderate sensitivity (54%, 57%) and PPV (54%, 41%). After administration of the bronchodilator, the Spearman correlation coefficient between the different expressions of delta PEF and delta FEV1% pred ranged between 0.52 and 0.54. Commonly used cut off values for BDR of delta PEF% init (increase in PEF as percentage of initial value) > or = 20% and delta PEF% init > or = 25% had a high specificity (96%, 96%), a reasonable NPV (74%, 69%) and PPV (74%, 85%), but a moderate sensitivity (51%, 53%). In conclusion, PEF testing has the properties to be a good screening test to exclude airway obstruction and BDR (high specificity and NPV), but is of less clinical value as a diagnostic test (moderate sensitivity and PPV).

Adolescent↗