The development of a generic analysis method for natural and synthetic dyes by ultra-high-pressure liquid chromatography with photo-diode-array detection and triethylamine as an ion-pairing agent.

In cultural heritage the characterization of organic colorants is a challenging task. Currently, different chromatographic techniques are used to analyze natural and synthetic dyes separately, since the classes differ significantly in chemical properties and, therefore, chromatographic behavior. To save time, costs and sample material, we developed a method suitable for a wide variety of organic colorants using ultra-high-performance liquid chromatography coupled to a photo-diode-array detector. Gradient elution was performed with a mobile phase consisting of water and methanol with 5 mM triethylamine added as an ion-pairing agent at a pH of 3. Both linear and step gradients were optimized using the 'Program for Interpretive Optimization of Two-dimensional Resolution' (PIOTR) Pirok et al. [22]. Two optimized linear gradients and two step gradients were evaluated experimentally. The method was applied on a complex dye mixture containing nearly 130 natural- and synthetic-dye reference compounds. More than 100 of these compounds could be identified in a single experiment. The feasibility of the method was demonstrated by analyzing samples of several precious objects that were found in the Texel shipwreck Vos et al. [2] and of two embroideries of Emile Bernard, the results of which are described in this paper.

An interactive CD-ROM to inform patients about stem cell transplantation.

OBJECTIVE: Cancer patients receiving chemotherapy or a Stem Cell Transplantation (SCT) are in need of information about their disease, treatment options and side effects. Patient education usually has to be given within limited time. Under these circumstances, patients may find it difficult to completely understand and to retain the information given. METHODS: As a supplement to standard information methods we developed an interactive CD-ROM with information on SCT. This CD-ROM provides both medical information and more subjective patients' experiences. Part one provides information regarding the treatment course from diagnosis through to post-discharge care. The second part consists of interviews with former patients and describes their experiences. As the system is interactive, it can be utilised according to the patient's individual preferences. The CD-ROM comprises audio, video, animations, pictures, and text. Printing of certain sections is optional. The technical format of the CD-ROM makes it relatively simple to utilise the information and to make it suitable for other institutions or even other treatments. In this preliminary study the acceptability of the interactive CD-ROM by patients undergoing a SCT is described. RESULTS: Patients' overall evaluations of the interactive CD-ROM were highly positive. For example, 90.2% (N=51) found it interesting, clear, useful and valued getting information by means of a CD-ROM. Most patients would recommend the interactive CD-ROM to other patients in the same situation. CONCLUSION: The content of the CD-ROM on SCT as well as the computer-based interactive method are well accepted by patients. PRACTICE IMPLICATIONS: Computer-based education may enhance patient education and thus the quality of patient care. We must now establish the program's effectiveness. Moreover, plans have been developed to disseminate the information on SCT over the Internet. Future development of comparable programs and their evaluation should be encouraged to promote the well-being of cancer patients.

Predictors of patients' choices for breast-conserving therapy or mastectomy: a prospective study.

A study was undertaken to describe the treatment preferences and choices of patients with breast cancer, and to identify predictors of undergoing breast-conserving therapy (BCT) or mastectomy (MT). Consecutive patients with stage I/II breast cancer were eligible. Information about predictor variables, including socio-demographics, quality of life, patients' concerns, decision style, decisional conflict and perceived preference of the surgeon was collected at baseline, before decision making and surgery. Patients received standard information (n=88) or a decision aid (n=92) as a supplement to support decision making. A total of 180 patients participated in the study. In all, 72% decided to have BCT (n=123); 28% chose MT (n=49). Multivariate analysis showed that what patients perceived to be their surgeons' preference and the patients' concerns regarding breast loss and local tumour recurrence were the strongest predictors of treatment preference. Treatment preferences in itself were highly predictive of the treatment decision. The decision aid did not influence treatment choice. The results of this study demonstrate that patients' concerns and their perceptions of the treatment preferences of the physicians are important factors in patients' decision making. Adequate information and communication are essential to base treatment decisions on realistic concerns, and the treatment preferences of patients.

The decisional conflict scale: further validation in two samples of Dutch oncology patients.

The importance of patient involvement in medical decision making is indisputable. Yet, decision making concerning medical treatment options is a difficult task for most patients. In order to study decision-making processes in health care, O'Connor developed the decisional conflict scale (DCS). The DCS assesses the level of 'decisional conflict' that patients experience while making health care decisions, and encompasses the following three subscales: (1) uncertainty about choosing among alternatives; (2) factors contributing to uncertainty; (3) perceived effectiveness of the decision. The aim of the present study is to investigate the reliability and validity of the Dutch version of the DCS. A written version of the DCS was administered in two samples of Dutch cancer patients. One sample consisted of cancer patients faced with the decision whether or not to undergo palliative chemotherapy (N=29). The other sample included women with early stage breast cancer who had to choose between mastectomy or lumpectomy followed by radiation therapy (N=141). The response rates were 76% and 91%, respectively. The reliability coefficients of the three subscales were 0.52, 0.80, 0.84, and 0.74, 0.83, 0.83 in the two samples, respectively. Construct validity was partly supported. Criterion validity was substantiated. In evaluating the factorial validity, it was found that the original three-factor model had to be rejected (chi(2)(87)=293, root mean square error of approximation (RMSEA)=0.137). A subsequent exploratory factor analysis suggested an alternative four-factor model. The psychometric properties of the DCS were partly confirmed in Dutch cancer patients. Improved 'wording' of certain items, e.g. to avoid double negatives, could further increase the factorial validity of the DCS. Then, this scale may be a valuable tool for studies that address the quality of medical decision making.

[Interactive cd-rom on the choice between breast-sparing treatment and mastectomy: positive responses from patients and surgeons]. / Interactieve cd-rom over de keuze tussen borstsparende behandeling en amputatie: positieve reacties van patiënten en chirurgen.

OBJECTIVE: To assess how breast cancer patients and surgeons rate an interactive decision aid, using CD-ROM technology, developed to support a choice between breast-conserving therapy and mastectomy. DESIGN: Questionnaire investigation. METHOD: Written questionnaires were presented to patients as soon as they had finished using the CD-ROM. They responded on a 5-point scale. Surgeons (n = 14) were sent a written questionnaire to investigate their experiences of using the CD-ROM program. RESULTS: The interactive CD-ROM was offered to 92 consecutive breast cancer patients. Responses were obtained from 86 (93%) of the patients. The remainder were inadvertently not given the questionnaire. All of the patients evaluated the program as positive. Most of the patients found the program to be 'interesting', 'clear', 'useful', 'encouraging', and 'reassuring'. A majority (n = 76) expressed the view that the amount of information received was 'just right'. The interactive, computer-based method was evaluated as 'agreeable' by 74 patients. Almost all of the patients (n = 82) recommended that the program be shown to other patients. All of the surgeons (n = 14) stated that their patients' evaluations of the program were positive. Moreover, most of the surgeons (n = 10) were of the opinion that the program 'considerably contributed' to the provision of information. With the exception of one surgeon (n = 13), they all held the view that the program can be offered to breast cancer patients facing a choice between breast-conservation or mastectomy on a standard basis. CONCLUSION: Interactive decision-making support by means of a CD-ROM for patients with breast cancer, received positive evaluations from both the patients and surgeons.

Decision support for patients with early-stage breast cancer: effects of an interactive breast cancer CDROM on treatment decision, satisfaction, and quality of life.

PURPOSE: To investigate the effects of the Interactive Breast Cancer CDROM as a decision aid for breast cancer patients with a choice between breast conserving therapy (BCT) and mastectomy (MT). PATIENTS AND METHODS: Consecutive patients with stage I and II breast cancer were enrolled. A quasi-experimental, longitudinal, and pretest/posttest design was used. Follow-up was scheduled 3 and 9 months after discharge from the hospital. Control patients (n = 88) received standard care (oral information and brochures). The CDROM was provided to patients in the experimental condition (n = 92) as a supplement to standard procedures. Outcome variables were treatment decision, satisfaction, and quality of life (QoL). RESULTS: No effect on treatment decision was found. CDROM patients expressed more general satisfaction with information at 3 and 9 months (95% confidence interval for the difference (d) between the means (d: 4.1 to 12.5 and 5.7 to 14.2 respectively). CDROM patients were also more satisfied with their treatment decision at 3 and at 9 months (d: 0.1 to 0.4; 0.2 to 0.5). Moreover, at 9 months, CDROM patients were more satisfied with breast cancer-specific information (d: 0.9 to 16.5), the decision-making process (d: 0.1 to 0.4), and communication (d: 0.2 to 11.0). At 3 and 9 months, a positive effect was found on general health (d: 0.2 to 14.5 and 0.3 to 15.0). Moreover, at 9 months, CDROM patients reported better physical functioning (d: 5.1 to 19.8), less pain (d: -17.9 to -4.5), and fewer arm symptoms (d: -14.1 to -0.5). CONCLUSION: The Interactive Breast Cancer CDROM improved decision making in patients with early-stage breast cancer with a choice between BCT and MT, as evaluated in terms of patients' satisfaction and QoL.

Feasibility and effects of decision aids.

Decision aids for patients have recently been introduced in health care. A literature review was conducted to address the following research questions: 1) which types of decision aids have been developed?; 2) to what extent are they feasible, and acceptable to patients and health care providers?; 3) do decision aids affect the decision-making process and patients' outcomes? Thirty non-controlled (e.g., one-group-only designs) and controlled studies (e.g., randomized experimental designs) were identified. Decision aids were found to be feasible and acceptable to patients and to increase the agreement between patients' values and decisions and patients' knowledge. The effects of decision aids on decisions and on patients' outcomes, including decision uncertainty, satisfaction, and health, have rarely been addressed. When studied, the beneficial effects of decision aids on these outcomes appear to be rather modest. Implications for future development of decision aids and the design of studies are discussed.

Focus group interviews with risk-taking gay men: appraisal of AIDS prevention activities, explanations for sexual risk-taking, and needs for support.

Recently, several findings demonstrated an increase in high-risk sexual behaviour among gay men. This study conducted focus groups with gay men who engaged in risk-taking behaviour with casual partners. Three issues were addressed: appraisal of current AIDS prevention activities, explanations for sexual risk-taking, and needs for support. The results show that participants criticize current prevention efforts. The explanations for risk-taking behaviour contribute to a better understanding of the underlying processes related to sexual risk-taking. Participants' needs include unequivocal information on HIV and AIDS, more insight into the rationality behind safe sex directives, and more opportunities to discuss their difficulties regarding safe sex behaviour with peers.