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STUDY QUESTION What is the performance of the patient-centredness of endometriosis care in a secondary and a tertiary care setting and how can it be improved? SUMMARY ANSWER Overall, patient-centredness was comparable in the two endometriosis care centres, but differed regarding ‘physical comfort’ and ‘continuity and transition’; both centres can learn how to improve several of their targets from the other’s strengths. WHAT IS KNOWN ALREADY The ENDOCARE questionnaire (ECQ) is a validated questionnaire for assessing the important quality dimension ‘patient-centredness’. Patient-centredness is associated with quality of life, although this should be explored further by larger-scale studies. STUDY DESIGN, SIZE, DURATION A cross-sectional survey, relying on the ECQ, was performed (during 2015 and 2016) among 407 women with surgically diagnosed endometriosis. PARTICIPANTS/MATERIALS, SETTING, METHODS This study was conducted in a secondary and a tertiary care centre in the Netherlands. A total of 209 Dutch-speaking women who had endometriosis surgery (2013–2014), completed the ECQ after a postal invitation and, if needed, postal reminders. The assessed outcomes were: overall patient-centredness, the patient-centredness for each of its 10 dimensions, and the patient-centred strengths and targets for improvement. Case-mix adjusted patient-centredness scores (PCS) were compared and strengths and targets for improvement were identified with a matrix modelling importance against experience. The need to improve the targets was quantified with quality impact indices. MAIN RESULTS AND THE ROLE OF CHANCE No difference was demonstrated between the overall PCS of the secondary and tertiary centres (respectively: 4.8 and 4.5; P = 0.15). No difference was found in PCS per dimension between the two clinics except for the secondary care centre performing better regarding ‘physical comfort’ (respectively: 4.5 and 3.0; P = 0.01) and ‘continuity and transition’ (respectively: 6.0 and 4.2; P = 0.01). The two centres had nine targets for improvement in common. The secondary and tertiary centres, respectively, had five and seven additional centre-specific targets for improvement. Cross-centre learning is encouraged as 9 out the 12 additional centre-specific targets were strengths in the other centre. The main improvement targets were being able to contact the centre in case of emergency (both centres), the involvement of a significant other (secondary centre), diagnostic delay (secondary centre), personal follow-up (tertiary centre) and disclosing the level of competence of healthcare providers (tertiary centre). LIMITATIONS, REASON FOR CAUTION Responders did not differ from non-responders in their stage of endometriosis, educational level, rating of endometriosis care and degree to which their complaints are suppressed. Endometriosis is a chronic condition and patient-centredness might be experienced differently at other points of the endometriosis care trajectory. WIDER IMPLICATION OF THE FINDINGS The ECQ is a useful tool to assess patient-centredness in both secondary and tertiary care centres. Further research should focus on how to improve endometriosis care. STUDY FUNDING/COMPETING INTEREST(S) No external funding was used. V.M. and C.B.L. report grants from Guerbet, grants from Merck and grants from Ferring outside the submitted work. All authors declare that they have no competing interests concerning this publication.

STUDY QUESTION What are the patient-specific determinants associated with patient-centered endometriosis care as measured by the ENDOCARE questionnaire (ECQ)? SUMMARY ANSWER ‘Overall grade for endometriosis care’, ‘educational level’, ‘membership of a patient organization’ and ‘having seen other specialists for endometriosis complaints’ are correlated with overall patient-centeredness scores (PCS). WHAT IS KNOWN ALREADY Patient-centeredness of endometriosis care can be evaluated using the validated ECQ. The ECQ leads to an overall PCS and separate PCS for 10 dimensions of endometriosis care. Previously, educational level and quality of life scores were found to be associated with ECQ results. STUDY DESIGN, SIZE, DURATION First, a systematic literature review was performed (PROSPERO registration number: CRD42020169872). MEDLINE, Cochrane CENTRAL and EMBASE databases were searched from inception to May 2020 for studies in any language reporting on the results of the ECQ in patients with endometriosis. Two studies were identified. From the two studies, all original data were merged. In total, data from 546 patients were available for analysis. Second, univariate and multivariate regression analyses were performed to identify determinants for patient-centeredness of endometriosis care. PARTICIPANTS/MATERIALS, SETTING, METHODS The two included studies evaluated patient-centeredness in four endometriosis care centers in Belgium and the Netherlands. All participants had surgically proven endometriosis. Possible patient-specific determinants were selected from the demographic and medical questions from the first part of the ECQ. These determinants were evaluated using linear regression analysis and all possible determinants with a P > 0.2 in the univariate analysis were selected for stepwise multivariate analysis. Separate analyses were performed for overall PCS and each of the 10 dimensions. MAIN RESULTS AND THE ROLE OF CHANCE The two included studies provided data from 546 patients. After adjustment for care center, multivariate analysis showed that a higher ‘grade for endometriosis care’ (B = 0.66), a ‘lower educational level’ (B = 0.50), ‘being member of a patient organization’ (B = 0.49) and ‘having seen other specialists for endometriosis complaints’ (B = 0.34) were independently associated with higher overall PCS (R2 = 0.41). ‘Grade for endometriosis care’ was a determinant for all dimensions of endometriosis care. ‘Having seen other specialists for endometriosis complaints’ was positively associated with the care dimensions ‘respect for patients’ values, preferences and expressed needs’, ‘continuity and transition’ and ‘technical skills’. Members of a patient organization showed higher scores on the care dimensions ‘emotional support and alleviation of fear and anxiety’, ‘continuity and transition’ and ‘endometriosis clinic staff’. Furthermore, we found that having a higher level of education is associated with lower scores in the care dimensions ‘physical comfort’, ‘emotional support and alleviation of fear and anxiety’ and ‘involvement of significant other’. LIMITATIONS, REASONS FOR CAUTION These results delineate the patient-specific determinants of patient-centered care as measured using the Dutch ECQ. Whether results are generalizable to other countries should be investigated in an international study. This requires the ECQ to be validated in other languages first. WIDER IMPLICATIONS OF THE FINDINGS The aforementioned determinants of patient-centered care are of value for studies benchmarking clinics for their patient-centeredness. In addition, they help clinicians to determine how to tailor their care to individual patients. At every visit, patients could be asked to grade the endometriosis care (on a scale of 0–10) to easily investigate patient-centeredness. When there is more time, women with endometriosis should be asked to complete the entire ECQ to investigate patient-centeredness in depth. STUDY FUNDING/COMPETING INTEREST(S) The department of reproductive medicine (involving C.B.L. and V.M.) of the Amsterdam UMC, Vrije Universiteit Amsterdam has received several research and educational grants from Guerbet, Merck and Ferring. The authors have no conflict of interest related to this manuscript.

STUDY QUESTION: Does lower quartile normal range thyroid stimulating hormone (TSH) compared to higher quartile normal range in women without thyroid hormone substitution affect live birth rate after a complete IUI treatment series?SUMMARY ANSWER: Lower quartile normal range TSH, in women without thyroid hormone substitution, does not affect live birth rate after a complete intrauterine insemination treatment series compared to higher quartile normal range TSH.WHAT IS KNOWN ALREADY: TSH is historically seen as the most sensitive test for thyroid function. Its distribution is right-skewed. Whether the preconceptional upper reference TSH values in subfertile women should be 2.5 or 4.5 mIU/L is under debate. Studies have shown that IUI patients treated with levothyroxine for TSH levels above 2.5 mIU/L show higher pregnancy rates. However, no adverse outcome is associated with untreated high normal TSH levels studied in first IUI cycles. Thyroid peroxidase antibodies have also impaired outcomes in some studies whereas others have shown an effect only in combination with high normal TSH levels. As a subgroup, patients with unexplained infertility showed increased levels of TSH. This article adds to the value of TSH evaluation and fertility outcome in four quartiles and in the context of a completed IUI treatment modus of a maximum of six inseminations.STUDY DESIGN SIZE DURATION: This is a retrospective cohort study in 909 women undergoing 3588 IUI cycles starting treatment between the first of January 2008 and the first of March 2012.PARTICIPANTS/MATERIALS SETTING METHODS: Women aged 22-45 years with TSH 0.3-4.5 mIU/L without thyroid hormone substitution were included at Amsterdam UMC, Vrije Universiteit, Amsterdam, the Netherlands, an Iodine-sufficient area. The primary endpoint was live birth. Clinical pregnancy, pregnancy loss and ongoing pregnancy were secondary endpoints. Logistic regression was used with the natural logarithm of TSH as a continuous predictor. Chi-square tests and logistic regression were used to compare groups of patients based on TSH values in four quartile TSH groups (0.3-1.21 mIU/L; 1.22-1.75 mIU/L; 1.76-2.34 mIU/L; 2.35-4.5 mIU/L) on basic characteristics and on the endpoints while adjusting for confounders.MAIN RESULTS AND THE ROLE OF CHANCE: Analysis with the natural logarithm of TSH as a continuous variable showed no association with live birth, pregnancy chance or pregnancy loss. There were no differences in any of the outcomes across the quartile TSH level ranges after regression analysis before and after adjusting for age, BMI, use of alcohol, tobacco, use or gonadotrophins, sperm count, diminished ovarian reserve, unexplained infertility and primary or secondary subfertility.The distribution of primary and secondary subfertility and smoking characteristics were remarkably different across the four groups, with proportionally the lowest prevalence of primary subfertility and the highest rate of smoking in the lowest TSH group (0.3-1.20 mIU/L).LIMITATIONS REASONS FOR CAUTION: Unknown values of free thyroxine and thyroid peroxidase antibodies, as well as the retrospective character of the study, limit the clinical interpretability.WIDER IMPLICATIONS OF THE FINDINGS: TSH in the highest quartile range (2.35-4.5 mIU/L) in subfertile women preceding IUI is not associated with a lower live birth rate or rate of clinical and ongoing pregnancy, or with loss of pregnancies, compared to subfertile women with TSH in the lower three quartile groups after complete intrauterine insemination treatment.STUDY FUNDING/COMPETING INTERESTs: The department of Obstetrics and Gynaecology, division of Reproductive Medicine, and of Internal Medicine, division of Endocrinology provided support. There are no competing interests.TRIAL REGISTRATION NUMBER: N/A.