Prospective Cohort Study

Lincoln, Yvonna, and Egon Guba, "Postpositivism and the Naturalist Paradigm," pp. 14-46 in Yvonna Lincoln and Egon Guba, Naturalistic Inquiry . Beverly Hills, CA: Sage, 1985.*

Secret History: Return of the Black Death Channel 4, 7-8pm In 1348 the Black Death swept through London, killing people within days of the appearance of their first symptoms. Exactly how many died, and why, has long been a mystery. This Secret History documentary follows experts as they pick through the evidence and reveal why the plague killed on such a scale. And they ask, what might be coming next?

Medscape

1. Introduction and Overview. 2. Detecting Influential Observations and Outliers. 3. Detecting and Assessing Collinearity. 4. Applications and Remedies. 5. Research Issues and Directions for Extensions. Bibliography. Author Index. Subject Index.

Regression Diagnostics: Identifying Influential Data and Sources of Collinearity

https://www.commed.vcu.edu/Chronic_Disease/2012/cochranrvwrschbias.pdf

The Cochrane Collaboration's tool for assessing risk of bias in randomised trials

Staphylococcal meningitis associated with implantation of an intrathecal drug pump for spasticity was successfully treated by intrathecal vancomycin delivered by the same pump. This produced high CSF antibiotic levels, and the pump and catheter system did not have to be removed. We are unable to identify a similar case reported in the literature to date.

Staphylococcal meningitis following synchromed intrathecal pump implant: A case report.

Effective doctor-patient communication is an integral part of good clinical care. Telling a patient that he/she has cancer can be a daunting task. If done with empathy and sensitivity it can create an important bond between the doctor and patient. If done brusquely and without tact it can create barriers and lasting hostility. Several key steps help make the breaking of bad news easier for doctors and patients. There is not one 'right formula' but appreciation of and responsiveness to the patient's verbal and non-verbal signals are core skills which can be developed.

https://pmj.bmj.com/content/postgradmedj/72/843/25.full.pdf

Discussing the diagnosis and prognosis with cancer patients.

Neuropathic pain in cancer is common and debilitating. It is important to differentiate neuropathic pain from other cancer-related pains as it is associated with worse pain outcomes and requires different treatment strategies. This review summarises recent updates to pain classification, aetiology, pain assessment and current recommendations for treatment in patients with cancer-related neuropathic pain.

https://www.mdpi.com/2072-6694/11/3/373/pdf

Cancer-Related Neuropathic Pain

Background
This is an update of a review first published in The Cochrane Library in Issue 3, 2013. Cancer-related pain places a heavy burden on public health with related high expenditure. Severe pain is associated with a decreased quality of life in patients with cancer. A significant proportion of patients with cancer-related pain are under-treated. There is a need for more effective control of cancer-related pain. Spinal cord stimulation (SCS) may have a role in pain management. The effectiveness and safety of SCS for patients with cancer-related pain is currently unknown.

Objectives
This systematic review evaluated the effectiveness of SCS for cancer-related pain compared with standard care using conventional analgesic medication. We also appraised risk and potential adverse events associated with the use of SCS.

Search methods
This is an update of a review first published in The Cochrane Library in Issue 3, 2013. The search strategy for the update was the same as in the original review. We searched the following bibliographic databases in order to identify relevant studies: the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library; MEDLINE; EMBASE; and CBM (Chinese Biomedical Database) in October 2014. We also handsearched relevant journals. There were no language restrictions.

Selection criteria
We planned to include randomised controlled trials (RCTs) that directly compared SCS with other interventions with regards to the effectiveness of pain management. We also planned to include cross-over trials that compared SCS with another treatment. We planned to identify non-randomised controlled trials but these would only be included if no RCTs could be found.

Data collection and analysis
The literature search for the update of this review found 121 potentially eligible articles. The initial search strategy yielded 430 articles. By scrutinising titles and abstracts, we found 412 articles irrelevant to the analytical purpose of this systematic review due to different scopes of diseases or different methods of intervention (intrathecal infusion system; oral medication) or aims other than pain control (spinal cord function monitoring, bladder function restoration or amelioration of organ metabolism). The remaining 18 trials were reviewed as full manuscripts. No RCTs were identified. Fourteen sporadic case reports and review articles were excluded and four before-and-after case series studies (92 participants) were included. Two review authors independently selected the studies to be included in the review according to the prespecified eligibility criteria. A checklist for methodological quality of non-randomised controlled trials was used (STROBE checklist) and all review authors discussed and agreed on the inclusion of trials and the results of the quality assessment.

Main results
No new studies were identified for inclusion in this update of the review. Four before-and-after case series studies (a total of 92 participants) met our criteria for inclusion in the previous version of the review. All included trials adopted a visual analogue scale (VAS) to evaluate pain relief. Heterogeneity existed in terms of baseline characteristics, electrode and stimulator parameters, level of implantation and route of implantation; each trial reported data differently. In two trials, pain relief was achieved in 76% (48/63) of participants at the end of the follow-up period. In the third trial, pre-procedure VAS was 6 to 9 (mean 7.43 ); the one-month post-implant VAS was 2 to 4 (mean 3.07); the 12-month post-implant VAS was 1 to 3 (mean 2.67). In the fourth trial, the pre-procedure VAS was 6 to 9 (mean 7.07); 1 to 4 (mean 2.67) at one-month; 1 to 4 (mean 1.87) at 12 months. Analgesic use was largely reduced. The main adverse events were infection of sites of implantation, cerebrospinal fluid (CSF) leakage, pain at the sites of electrodes, dislodgement of the electrodes, and system failure; however, the incidence in participants with cancer could not be calculated. Since all trials were small, non-randomised controlled trials, they carried high or unclear risk of all types of bias.

Authors' conclusions
Since the first publication of this review, no new studies were identified. Current evidence is insufficient to establish the role of SCS in treating refractory cancer-related pain. Future randomised studies should focus on the implantation of SCS in participants with cancer-related pain.

Spinal cord stimulation for cancer-related pain in adults.

The relationship between opioid dose, dantron dose, bowel function and physical functioning (measured with the modified Barthel Index) was determined in a sample of 50 inpatients with advanced cancer. Data were collected prospectively from chart review and patient interviews one week after admission to allow for protocol-driven management of constipation to be established. Bowel scores were significantly reduced in 35 patients treated with opioids compared with 15 patients not treated with opioids. Within the opioid group, however, there was no relationship between opioid dose, bowel score, dantron dose or Barthel Index. Higher doses of dantron were associated with better physical functioning (but not opioid dose) suggesting that for any given dose of opioid, fitter patients were treated with larger doses of laxatives. Factors other than opioid dose and physical functioning may be more important in contributing to constipation in this group of patients. Less potent opioid drugs, such as codeine, are just as likely to cause constipation as more potent opioids.

Michael I. Bennett

Papers

Staphylococcal meningitis following synchromed intrathecal pump implant: A case report.

Discussing the diagnosis and prognosis with cancer patients.

Cancer-Related Neuropathic Pain

Spinal cord stimulation for cancer-related pain in adults.

Factors influencing constipation in advanced cancer patients: a prospective study of opioid dose, dantron dose and physical functioning.