The Contribution of Anthropometry and Socioeconomic Status to Racial Differences in Measures of Lung Function: A Systematic Review.

BACKGROUND: The current approach to interpretation of lung function measurements assumes that differences in lung function between racial and ethnic groups represent inherent and biological differences. Observed differences in lung function between White and Black populations are often attributed to physiological differences in body proportions (eg, chest size, leg length); however, most studies investigating the observed differences have not considered the impact of socioeconomic status (SES). RESEARCH QUESTION: What proportion of the differences in lung function between Black and White populations can be attributed to SES and/or differences in body proportions? STUDY DESIGN AND METHODS: PubMed and EMBASE were searched up to March 2022 for articles relating to Black race, SES, and lung function. A total of 4,673 titles and abstracts were screened, followed by assessment for extractable data; 11 articles were ultimately included in this systematic review. RESULTS: There is substantial heterogeneity in the contribution of SES and body proportions to the observed differences in lung function between Black and White individuals. The proportion of differences between Black and White study participants attributable to SES factors ranged from 2.2% to 43.3% in FEV1 and from 4.1% to 41.9% for FVC. Studies that adjusted for sitting height explained 3% to 31.7% of the racial difference in lung function. INTERPRETATION: Reproducible research aimed at explaining the etiology of the differences in lung function between populations is difficult to achieve. The evidence to support the use of race/ethnic specific equations is limited, and the practice needs to be re-evaluated.

Cost effectiveness of therapist delivered cognitive behavioural therapy and web-based self-management in irritable bowel syndrome: the ACTIB randomised trial.

BACKGROUND: Telephone therapist delivered CBT (TCBT) and web-based CBT (WCBT) have been shown to be significantly more clinically effective than treatment as usual (TAU) at reducing IBS symptom severity and impact at 12 months in adults with refractory IBS. In this paper we assess the cost-effectiveness of the interventions. METHODS: Participants were recruited from 74 general practices and three gastroenterology centres in England. Interventions costs were calculated, and other service use and lost employment measured and costed for one-year post randomisation. Quality-adjusted life years (QALYs) were combined with costs to determine cost-effectiveness of TCBT and WCBT compared to TAU. RESULTS: TCBT cost £956 more than TAU (95% CI, £601-£1435) and generated 0.0429 more QALYs. WCBT cost £224 more than TAU (95% CI, - £11 to £448) and produced 0.029 more QALYs. Compared to TAU, TCBT had an incremental cost per QALY of £22,284 while the figure for WCBT was £7724. After multiple imputation these ratios increased to £27,436 and £17,388 respectively. Including lost employment and informal care, TCBT had costs that were on average £866 lower than TAU (95% CI, - £1133 to £2957), and WCBT had costs that were £1028 lower than TAU (95% CI, - £448 to £2580). CONCLUSIONS: TCBT and WCBT resulted in more QALYs and higher costs than TAU. Complete case analysis suggests both therapies are cost-effective from a healthcare perspective. Imputation for missing data reduces cost-effectiveness but WCTB remained cost-effective. If the reduced societal costs are included both interventions are likely to be more cost-effective. Trial registration ISRCTN44427879 (registered 18.11.13).

Therapist telephone-delivered CBT and web-based CBT compared with treatment as usual in refractory irritable bowel syndrome: the ACTIB three-arm RCT.

BACKGROUND: Irritable bowel syndrome (IBS) affects 10-22% of people in the UK. Abdominal pain, bloating and altered bowel habits affect quality of life and can lead to time off work. Current treatment relies on a positive diagnosis, reassurance, lifestyle advice and drug therapies, but many people suffer ongoing symptoms. Cognitive-behavioural therapy (CBT) is recommended in guidelines for patients with ongoing symptoms but its availability is limited. OBJECTIVES: To determine the clinical effectiveness and cost-effectiveness of therapist telephone-delivered CBT (TCBT) and web-based CBT (WCBT) with minimal therapist support compared with treatment as usual (TAU) in refractory IBS. DESIGN: This was a three-arm randomised controlled trial. SETTING: This trial took place in UK primary and secondary care. PARTICIPANTS: Adults with refractory IBS (clinically significant symptoms for 12 months despite first-line therapies) were recruited from 74 general practices and three gastroenterology centres from May 2014 to March 2016. INTERVENTIONS: TCBT - patient CBT self-management manual, six 60-minute telephone sessions over 9 weeks and two 60-minute booster sessions at 4 and 8 months (8 hours' therapist time). WCBT - interactive, tailored web-based CBT, three 30-minute telephone sessions over 9 weeks and two 30-minute boosters at 4 and 8 months (2.5 hours' therapist time). MAIN OUTCOME MEASURES: Primary outcomes - IBS symptom severity score (IBS SSS) and Work and Social Adjustment Scale (WSAS) at 12 months. Cost-effectiveness [quality-adjusted life-years (QALYs) and health-care costs]. RESULTS: In total, 558 out of 1452 patients (38.4%) screened for eligibility were recruited - 186 were randomised to TCBT, 185 were randomised to WCBT and 187 were randomised to TAU. The mean baseline Irritable Bowel Syndrome Symptom Severity Score (IBS SSS) was 265.0. An intention-to-treat analysis with multiple imputation was carried out at 12 months; IBS SSS were 61.6 points lower in the TCBT arm [95% confidence interval (CI) 89.5 to 33.8; p < 0.001] and 35.2 points lower in the WCBT arm (95% CI 57.8 to 12.6; p = 0.002) than in the TAU arm (IBS SSS of 205.6). The mean WSAS score at 12 months was 10.8 in the TAU arm, 3.5 points lower in the TCBT arm (95% CI 5.1 to 1.9; p < 0.001) and 3.0 points lower in the WCBT arm (95% CI 4.6 to 1.3; p = 0.001). For the secondary outcomes, the Subject's Global Assessment showed an improvement in symptoms at 12 months (responders) in 84.8% of the TCBT arm compared with 41.7% of the TAU arm [odds ratio (OR) 6.1, 95% CI 2.5 to 15.0; p < 0.001] and 75.0% of the WCBT arm (OR 3.6, 95% CI 2.0 to 6.3; p < 0.001). Patient enablement was 78.3% (responders) for TCBT, 23.5% for TAU (OR 9.3, 95% CI 4.5 to 19.3; p < 0.001) and 54.8% for WCBT (OR 3.5, 95% CI 2.0 to 5.9; p < 0.001). Adverse events were similar between the trial arms. The incremental cost-effectiveness ratio (ICER) (QALY) for TCBT versus TAU was £22,284 and for WCBT versus TAU was £7724. Cost-effectiveness reduced after imputation for missing values. Qualitative findings highlighted that, in the CBT arms, there was increased capacity to cope with symptoms, negative emotions and challenges of daily life. Therapist input was important in supporting WCBT. CONCLUSIONS: In this large, rigorously conducted RCT, both CBT arms showed significant improvements in IBS outcomes compared with TAU. WCBT had lower costs per QALY than TCBT. Sustained improvements in IBS symptoms are possible at an acceptable cost. Suggested future research work is longer-term follow-up and research to translate these findings into usual clinical practice. FUTURE WORK: Longer-term follow-up and research to translate these findings into usual clinical practice is needed. TRIAL REGISTRATION: Current Controlled Trials ISRCTN44427879. FUNDING: This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment (HTA) programme and will be published in full in Health Technology Assessment; Vol. 23, No. 17. See the NIHR Journals Library website for further project information. The University of Southampton sponsored this study. Funding was received from the NIHR HTA Board and the NIHR Clinical Research Network and support was received from the NIHR Clinical Research Network.

Irritable bowel syndrome (IBS) is a common bowel disorder causing pain, bloating and diarrhoea or constipation, which can affect quality of life. Treatment relies on a positive diagnosis, reassurance, lifestyle advice and drug therapies. However, many patients suffer ongoing distressing symptoms. Guidelines recommend cognitive­behavioural therapy (CBT) for patients with ongoing IBS symptoms. However, access to therapy is limited because of cost and therapist availability. We previously developed web-based CBT (WCBT), which is more accessible, less expensive and requires less therapist time than traditional therapist telephone-delivered CBT (TCBT). The aim of the current trial was to assess the clinical effectiveness and cost-effectiveness of these two approaches. Participants were randomly assigned to TCBT, WCBT or treatment as usual (TAU). The TCBT group received a CBT manual and six 1-hour telephone CBT sessions with trained therapists over 9 weeks and two booster sessions at 4 and 8 months. The WCBT group received access to the interactive CBT website with eight online sessions at home over 9 weeks, with similar content to the therapist CBT, and received three 30-minute therapist telephone-delivered CBT sessions and two boosters at 4 and 8 months. There were 558 adults with ongoing IBS symptoms who took part from 74 general practice surgeries and three hospital clinics in London and the south of England. The main study outcomes were the IBS Symptom Severity Score and the Work and Social Adjustment Scale, which measures people's ability to function and live their lives. The results of these were collected at the start of the study and at 3, 6 and 12 months. Significant improvement in symptoms was found in the two therapy groups compared with TAU at 3, 6 and 12 months. Cost-effectiveness and wider benefits (e.g. ability to cope and mood) also showed positive results, indicating that sustained improvements in IBS symptoms are possible at an acceptable cost.

A multicentre randomiSed controlled TRial of IntraVEnous immunoglobulin compared with standard therapy for the treatment of transverse myelitis in adults and children (STRIVE).

BACKGROUND: Transverse myelitis (TM) is an immune-mediated disorder of the spinal cord that affects adults and children and that causes motor, sensory and autonomic dysfunction. There is a prolonged recovery phase, which may continue for many years. Neuromyelitis optica (NMO) is an uncommon relapsing inflammatory central nervous system condition in which TM can be the first presenting symptom. As TM and NMO affect many patients in the prime of their working life, the disorder can impose a significant demand on health resources. There are currently no robust controlled trials in children or adults to inform the optimal treatment of TM. However, treatment with intravenous immunoglobulin (IVIG) is being effectively used in the management of a range of neurological conditions. Although other interventions such as plasma exchange (PLEX) in addition to intravenous (IV) methylprednisolone therapy can be beneficial in TM, PLEX is costly and technically challenging to deliver in the acute setting. IVIG is more readily accessible and less costly. OBJECTIVE: To evaluate whether additional and early treatment with IVIG is of extra benefit in TM compared with standard therapy with IV steroids. DESIGN: A multicentre, single-blind, parallel-group randomised controlled trial of IVIG compared with standard therapy for the treatment of TM in adults and children. PARTICIPANTS: Patients aged ≥ 1 year diagnosed with either acute first-onset TM or first presentation of NMO. Target recruitment was 170 participants (85 participants per arm). INTERVENTIONS: Participants were randomised 1 : 1 to treatment with IV methylprednisolone only or treatment with IV methylprednisolone plus 2 g/kg of IVIG in divided doses within 5 days of the first commencement of steroid therapy. MAIN OUTCOME MEASURES: Primary outcome measure - American Spinal Injury Association (ASIA) Impairment Scale at 6 months post randomisation, with a good outcome defined by a two-grade change. Secondary and tertiary outcome measures - ASIA motor and sensory scales, Expanded Disability Status Scale, health outcome, quality of life, Client Service Receipt Inventory and International Spinal Cord Injury Pain, Bladder and Bowel Basic Data Sets. RESULTS: In total, 26 participants were screened and two were randomised into the study. With the limited sample size, treatment effect could not be determined. However, we identified barriers to accrual that included strict inclusion criteria, the short enrolment window, challenges associated with the use of the ASIA Impairment Scale as an outcome measure and estimation of the incidence of TM. CONCLUSIONS: The study did not reach the end point and the effect of IVIG in TM/NMO could not be determined. Investigators should be aware of the potential challenges associated with carrying out a rare disease trial with a short enrolment window. The study question is one that still necessitates investigation. Preliminary work to ameliorate the effect of the barriers encountered in this study is vital. TRIAL REGISTRATION: EudraCT 2014-002335-34, ClinicalTrials.gov NCT02398994 and Current Controlled Trials ISRCTN12127581. FUNDING: This project was funded by the NIHR Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 21, No. 31. See the NIHR Journals Library website for further project information. Funding was also received from Biotest AG, Germany (supply of IVIG) and the Transverse Myelitis Society (excess research cost to facilitate study initiation).