Is body mass index associated with the incidence of endometriosis and the severity of dysmenorrhoea: a case–control study in China?

ObjectiveEndometriosis is considered as a serious gynaecological disease in women at a reproductive age. Lower body mass index (BMI) is thought to be a risk factor. However, recent studies indicated that women with normal BMI were also more likely to develop endometriosis, suggesting the association with BMI is controversial. We therefore investigated the association of BMI and surgically diagnosed endometriosis in a cohort of Chinese women.DesignRetrospective case–control study.SettingTertiary hospital.Patients709 women with endometriosis and 807 age matched controls between January 2018 and August 2019.InterventionAge at diagnosis, parity, gravida, BMI and self-reported dysmenorrhoea status were collected and the association of BMI and endometriosis was analysed.Measurement and main resultsOverall, the median BMI was not different between patients and controls (21.1 kg/m2 vs 20.9 kg/m2, p=0.223). According to the BMI categories for Asians/Chinese by WHO (underweight: <18.5 kg/m2, normal weight: 18.5–22.99 kg/m2, overweight: 23–27.49 kg/m2, obese: ≥27.50 kg/m2), overall, there was no difference in the association of BMI and endometriosis (p=0.112). 60% of patients were of normal weight. However, the OR of obese patients (BMI over 27.50 kg/m2) having endometriosis was1.979 (95% CI 1.15 to 3.52, p=0.0185), compared with women with normal weight. 50.3% patients reported dysmenorrhoea, and the OR of developing severe dysmenorrhoea in obese patients (BMI over 27.50 kg/m2) was 3.64 (95% CI 1.195 to 10.15, p=0.025), compared with patients with normal weight.ConclusionOur data demonstrate that overall there was no association between BMI and the incidence of endometriosis, but there was a significant increase in the incidence of endometriosis in obese women, compared with women with normal weight. Obesity was also a risk factor for severe dysmenorrhoea.

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Association between Body Mass Index and Risk of Coronavirus Disease 2019 (COVID-19): A Nationwide Case-control Study in South Korea

Clinical Infectious Diseases ◽

10.1093/cid/ciaa1257 ◽

2020 ◽

Cited By ~ 3

Author(s):

Chan-Young Jung ◽

Haeyong Park ◽

Dong Wook Kim ◽

Hyunsun Lim ◽

Jung Hyun Chang ◽

...

Keyword(s):

Body Mass Index ◽

Body Mass ◽

Case Control Study ◽

Case Control ◽

Normal Weight ◽

Logistic Regression Models ◽

Using Data ◽

Study Participants ◽

Control Study ◽

Age And Sex

Abstract Background Increased body mass index (BMI) has been associated with a higher risk of severe coronavirus disease 2019 (COVID-19) infections. However, whether obesity is a risk factor for contracting COVID-19 has hardly been investigated so far. Methods We examined the association between BMI level and the risk of COVID-19 infection in a nationwide case-control study comprised of 3788 case patients confirmed to have COVID-19 between 24 January and 9 April 2020 and 15 152 controls matched by age and sex, who were aged 20 years or more and underwent National Health Insurance Service (NHIS) health examinations between 2015−2017, using data from the Korean NHIS with linkage to the Korea Centers for Disease Control and Prevention data. Our primary exposure of interest was BMI level, categorized into 4 groups: <18.5 (underweight), 18.5–22.9 (normal weight), 23–24.9 (overweight), and ≥25 kg/m2 (obese). Results Of the entire 18 940 study participants, 11 755 (62.1%) were women, and the mean age of the study participants was 53.7 years (standard deviation, 13.8). In multivariable logistic regression models adjusted for sociodemographic, comorbidity, laboratory, and medication data, there was a graded association between higher BMI levels and higher risk of COVID-19 infection. Compared to normal-weight individuals, the adjusted odds ratios in the overweight and obese individuals were 1.13 (95% confidence interval [CI], 1.03–1.25) and 1.26 (95% CI, 1.15–1.39), respectively. This association was robust across age and sex subgroups. Conclusions Higher BMI levels were associated with a higher risk of contracting COVID-19.

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A Case-Control study of Body Mass Index and Infertility in Algerian Women (Sidi Bel Abbes, West of Algeria)

International Journal of Infertility & Fetal Medicine ◽

10.5005/jp-journals-10016-1110 ◽

2015 ◽

Vol 6 (3) ◽

pp. 103-107 ◽

Cited By ~ 1

Author(s):

Hichem Abdessalem MAÏ ◽

Abbassia Demmouche

Keyword(s):

Body Mass Index ◽

Confidence Interval ◽

Body Mass ◽

Odds Ratio ◽

Case Control Study ◽

Case Control ◽

Normal Weight ◽

Female Infertility ◽

Prevalence Of Obesity ◽

Control Study

ABSTRACT Introduction The prevalence of obesity and female infertility in Algeria has increased in past decades, and recent study are showing a relationship between body mass index (BMI) and the risk of female infertility, suggesting that obesity is a risk factor for infertility. In order to evaluate the risk of infertility associated with BMI, we conducted a case-control study. Materials and methods The relationship between BMI and female infertility was investigated in a case-control study of 256 infertile cases and 326 fertile control subjects. The BMI of infertile women was compared with the BMI of the control fertile group. Odds ratios (ORs) was calculated as measures of relative risk of infertility associated with BMI. Results Multiple analyses showed significant association between various measures of BMI and female infertility in this population. An association between BMI and infertility was observed for the overweight (25.00–29.99 kg/m2; odds ratio = 2.23; p = 0.021; 95% confidence interval, 1.52–3.25) and obese group (> 30 kg/m2; odds ratio = 3.26; p = 0.019; 95% confidence interval, 1.62–6.58) compared to the normal weight group. However, no association was found between underweight and infertility (BMI < 20 Kg/m2, odds ratio = 0.96; p = 0.063; 95% confidence interval, 0.57–1.63). Conclusion The present study confirms the results that the previously reported research have shown and affirm that an negative association exist between obesity and overweight with fertility, this association might be influenced by other factors, that's why larger and more research in the Algerian population are needed. How to cite this article MAÏ HA, Demmouche A. A Case-Control study of Body Mass Index and Infertility in Algerian Women (Sidi Bel Abbes, West of Algeria). Int J Infertil Fetal Med 2015;6(3):103-107.

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