Lars Holmberg

Diet, bone mass, and osteocalcin: A cross-sectional study

To determine the relationships among nutrient intake, bone mass, and bone turnover in women we have investigated these issues in a population-based, crosssectional, observational study in one county in central Sweden. A total of 175 women aged 28–74 at entry to the study were included. Dietary assessment was made by both a semiquantitative food frequency questionnaire and by four 1-week dietary records. Dual energy X-ray absorptiometry was performed at five sites: total body, L2–L4 region of the lumbar spine, and three regions of the proximal femur. Serum concentrations of osteocalcin (an osteoblast-specific protein reflecting bone turnover) were measured by a radioimmunoassay. Linear regression models, with adjustment for possible confounding factors, were used for statistical analyses. A weak positive association was found between dietary calcium intake as calculated from the semiquantitative food frequency questionnaire and total body bone mineral density (BMD) among premenopausal women. No association emerged between dietary calcium intake and sitespecific bone mass, i.e., lumbar spine and femoral neck, nor was an association found between dietary calcium intake and serum osteocalcin. BMD at some of the measured sites was positively associated with protein and carbohydrates and negatively associated with dietary fat. In no previous studies of diet and bone mass have dietary habits been ascertained so carefully and the results adjusted for possible confounding factors. Neither of the two methods of dietary assessment used in this study revealed any effect of calcium intake on BMD at fracture-relevant sites among these healthy, mostly middle-aged women. A weak positive association was found between calcium intake estimates based on the food frequency questionnaire and total body BMD. In this study population the preventive effect of high dietary calcium on osteoporosis is probably very weak. The independent significance of protein, carbohydrates, and fat is uncertain.

Psychosocial adjustment among husbands of women treated for breast cancer; mastectomy vs. breast-conserving surgery

Psychosocial adjustment was measured among 56 spouses of women operated for breast cancer. Of 69 eligible husbands, 56 participated. Twenty women underwent breast-conserving surgery (BCT) and 36 had a mastectomy (MT). An interview was conducted with each woman and her husband separately, 4 and 13 months after surgery. Two instruments were used; SBAS (Social Behaviour Assessment Schedule) and a scale (TB) constructed specifically for the study. The husbands of the women in the MT group were significantly more depressed after 4 months and reported complaints related to their wives disease more often than did those in the BCT group. After 4 months, the marital relation was assessed as more positive in the MT group. A total of 48% of the husbands in the sample expressed some emotional distress during the investigation period, which is similar to levels seen among breast cancer-operated women themselves. Overall, only marginally better scores were seen for husbands married to women who had undergone breast-conserving surgery. Few researchers have studied psychosocial reactions in the breast cancer patients family. Since patterns of social support empirically influence the rehabilitation of the cancer patient, this field of investigation is important.

Oral contraceptives and prognosis in breast cancer: effects of duration, latency, recency, age at first use and relation to parity and body mass index in young women with breast cancer.

The aim of this study was to examine associations between oral contraceptive (OC) use, body mass index (BMI = weight/height2) and prognosis in invasive breast cancer diagnosed before the age of 45. Survival analyses of a consecutive sample of breast cancer patients were undertaken. The cases were initially registered in a nationwide case-control study of OC use and risk of premenopausal breast cancer in Sweden and Norway. All 422 cases were under 45 years of age at diagnosis, and recruited from the reports to cancer registries (Sweden) or from surgical departments (Norway) during May 1984 through May 1985. Detailed information about OC exposure was obtained in the initial face-to-face interview. With Coxs proportional hazards analyses, a significantly lower hazard rate [relative hazard (RH) = 0.54; 0.31-0.94] was seen in short-term users (< 4 years)--but not in long-term (> or = 4 years) users--than in never-users of OC. Non-significant estimates for RHs lower than 1.0, i.e. better prognosis, with long recency (> 5 years) and latency (> or = 10 years) of OC use were noted. Prognosis was not influenced by age at first OC use or of its timing in relation to the first pregnancy. A higher BMI was associated with a poorer prognosis, RH 5.9 (2.0-17.8) for BMI > or = 29 versus BMI < 19, but BMI was not a confounder or an effect modifier of the association between OC use and prognosis. This study does not indicate that OC use prior to the diagnosis of breast cancer has any adverse effect on the prognosis, at least not in women under 45 years of age at diagnosis.

The cost-effectiveness of routine postoperative radiotherapy after sector resection and axillary dissection for breast cancer stage I. Results from a randomized trial

BACKGROUNDnCost-effectiveness of routine postoperative radiotherapy after breast-conserving surgery has not been prospectively evaluated earlier. In times of rationing of medical resources, valid assessments of cost-effectiveness are important for rational allocation of resources.nnnPURPOSEnCost and cost-effectiveness of routine postoperative radiotherapy was calculated in a prospective randomized trial comparing sector resection plus axillary dissection with (XRT group) or without (non-XRT group) postoperative radiotherapy in breast cancer stage I. Three hundred eighty-one patients were included. After a median follow-up of five years 43 local recurrences, six of them in the XRT-group occurred (P < 0.0001). No difference in regional and distant recurrence (P = 0.23) or survival (P = 0.44) was observed.nnnPATIENTS AND METHODSnDirect medical costs as well as indirect costs in terms of production lost during the treatment period and travel expenses were estimated from data in the medical records and the national insurance registry of each patient. Average costs of different treatment activities and measures were estimated for the XRT-group and the non-XRT group respectively. From these estimates differences in costs and effectiveness between the groups were calculated and marginal cost-effectiveness ratios were estimated. For the construction of QALYs each life-year was quality-adjusted by a utility value depending on which health state the patient was considered to perceive.nnnRESULTSnTaking into account the cost of primary treatment, the cost of follow-up, the cost of treatment of a local recurrence, travel expenses and indirect costs (production lost) excluding costs for treatment of regional and distant recurrence the cost per avoided local recurrence at five years was SEK 337,727 (

Survival in small intestinal adenocarcinoma

44,438, Pounds 27,018). Adjustment for quality of life showed a cost for every gained QALY to be SEK approximately 1.6 million, (

Sector Resection With or Without Postoperative Radiotherapy for Stage I Breast Cancer: Five-Year Results of a Randomized Trial

210,526, Pounds 128,000), range SEK 0.2-3.9 million (

Diet and hip fracture risk: a case-control study. Study Group of the Multiple Risk Survey on Swedish Women for Eating Assessment

26,315-513,158, Pounds 16,000-312,000).nnnCONCLUSIONnThe cost of routine postoperative radiotherapy after sector resection and axillary dissection in breast cancer stage I per avoided local recurrence and gained QALY is high. The cost per gained QALY show great variation depending on utility value, which in this study was derived from external observers and not from the patients themselves. These results stress the importance of identifying risk factors for local recurrence, better understanding of impact on quality of life of a local recurrence and adding cost evaluations to clinical trials in early breast cancer.

Effects of Different Designs and Extension of a Food Frequency Questionnaire on Response Rate, Completeness of Data and Food Frequency Responses

All cases of adenocarcinoma in the duodenum (n = 263) and jejunum/ileum (n = 663), diagnosed between 1960 and 1988, were recruited from the Swedish Cancer Registry. Corrected and overall survival were investigated by sex, age and year of diagnosis with life-table and Cox proportional hazards analyses. The corrected 5- and 10-year survival rates were 39% and 37% for duodenal tumours and 46% and 41% for those in jejunum/ileum (P = 0.16 for difference between sites). The corrected 5- and 10-year survival rates were 52% and 48% for women and 40% and 34% for men with tumours in jejunum/ileum (P = 0.0095 for difference by sex) while no such relation was found in duodenal tumours (P = 0.84). Survival correlated with age at diagnosis for duodenal tumours (P = 0.03377). A Cox proportional hazards analysis revealed a temporal trend with more favourable prognosis in recent years. This study confirms that prognosis of small bowel adenocarcinoma is serious, but gives a more optimistic outlook than many hitherto published series.