scholarly journals Types of Carbohydrates Intake during Pregnancy and Frequency of a Small for Gestational Age Newborn: A Case-Control Study

Nutrients ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 523 ◽  
Author(s):  
Carmen Amezcua-Prieto ◽  
Juan Martínez-Galiano ◽  
Naomi Cano-Ibáñez ◽  
Rocío Olmedo-Requena ◽  
Aurora Bueno-Cavanillas ◽  
...  
Keyword(s):  
Gestational Age ◽  
Small For Gestational Age ◽  
Conditional Logistic Regression ◽  
Case Control ◽  
Inverse Association ◽  
Odds Ratios ◽  
Case Control Studies ◽  
Logistic Regression Models ◽  
Matched Case ◽  
Brown Bread

The objective of this study was to assess the relationship between consumption of different types of carbohydrates (CHO) during pregnancy and the risk of having a small for gestational age (SGA) newborn. A retrospective matched case–control design was carried out with a total of 518 mother-offspring pairs. A total of 137 validated items were included in the food frequency questionnaire (FFQ). Conditional logistic regression models were used to calculate crude odds ratios (cORs) and adjusted odds ratios (aORs) with 95% confidence intervals (CIs). Having more than 75 g/day of brown bread showed an inverse association with SGA (aOR = 0.64, CI 0.43–0.96). In contrast, an intake of industrial sweets more than once a day (aOR = 2.70, CI 1.42–5.13), or even 2–6 times a week (aOR = 1.84, CI 1.20–2.82), increased the odds of having a SGA newborn. During pregnancy, the higher the increase of wholegrain cereal and bread, the lower the possibility of having a SGA newborn, but the opposite occurred with refined sugar products—just consuming industrial bakery products or pastries twice a week increased the odds of having an SGA infant. Case–control studies cannot verify causality and only show associations, which may reflect residual confusion due to the presence of unknown factors. It is possible that a high consumption of sugary foods is a marker of a generally poor lifestyle.

scholarly journals Effect of Adherence to a Mediterranean Diet and Olive Oil Intake during Pregnancy on Risk of Small for Gestational Age Infants

Nutrients ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1234 ◽  
Author(s):  
Juan Martínez-Galiano ◽  
Rocío Olmedo-Requena ◽  
Rocío Barrios-Rodríguez ◽  
Carmen Amezcua-Prieto ◽  
Aurora Bueno-Cavanillas ◽  
...  
Keyword(s):  
Olive Oil ◽  
Mediterranean Diet ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Conditional Logistic Regression ◽  
Statistical Significance ◽  
Odds Ratios ◽  
Logistic Regression Models ◽  
Matched Case ◽  
Control Study

To quantify the effect of a Mediterranean dietary pattern, as well as the consumption of olive oil (OO), on the risk of having a small for gestational age infants (SGA), a matched case-control study was conducted in Spain. Dietary intake during pregnancy was assessed using a validated food frequency questionnaire. Three indices were used to evaluate the adherence to Mediterranean diet (MD) (Predimed, Trichopoulou and Panagiotakos). Crude odds ratios (cOR) and adjusted odds ratios (aOR) and their 95% confidence intervals (CI) were estimated using conditional logistic regression models. Results were stratified by severity of SGA: moderate (percentiles 6–10), and severe (percentiles ≤5). For moderate, four or more points in the Predimed´s index was associated with a 41% reduction of having SGA compared with women with a score ≤3, aOR = 0.59 (95% CI 0.38–0.98); for severe, the reduction in risk was not statistically significant. Similar results were found when the other MD indexes were used. An intake of OO above 5 g/day was associated with a lower risk of SGA (aOR = 0.53, 95% CI 0.34–0.85); statistical significance was observed for moderate SGA (aOR = 0.53, 95% CI 0.30–0.96), but not for severe SGA (aOR = 0.51, 95% CI 0.24–1.07), although the magnitude of ORs were quite similar. Adherence to a MD and OO intake is associated with a reduced risk of SGA.

scholarly journals Nested Case-Control Studies With Multiple Measurements: Estimating Marginal Relationships

2021 ◽  
Author(s):  
Joshua N. Sampson ◽  
Paul S. Albert ◽  
Mark P. Purdue
Keyword(s):  
Conditional Logistic Regression ◽  
Case Control ◽  
Case Control Studies ◽  
Robust Variance ◽  
Non Hodgkin Lymphoma ◽  
Multiple Measurements ◽  
Matched Case ◽  
Nested Case Control ◽  
Standard Software ◽  
Single Time Point

Abstract Background: We consider the analysis of nested, matched, case-control studies that have multiple biomarker measurements per individual. We propose a simple approach for estimating the marginal relationship between a biomarker measured at a single time point and the risk of an event. We know of no other standard software package that can perform such analyses while explicitly accounting for the matching. Results: We propose an application of conditional logistic regression (CLR) that can include all measurements and uses a robust variance estimator. We compare our approach to other methods such as performing CLR with only the first measurement, CLR with an average of all measurements, and Generalized Estimating Equations. In simulations, our approach is significantly more powerful than CLR with one measurement or an average of all measurements, and has similar to power to GEE but correctly accounts for the matching. We then apply our approach to the CLUE cohort to show that an increased level of the immune marker sCD27 is associated with non‐Hodgkin lymphoma (NHL) and, by evaluating the strength of the association as a function of time until diagnosis, that the an increased level is likely an effect of the disease as opposed to a cause of the disease. The approach can be implemented by the R function clogitRV available at https://github.com/sampsonj74/clogitRV.Conclusion: We offered an approach and software for analyzing matched case-control studies with multiple measurements. We demonstrated that these methods are accurate, precise, and statistically powerful.

Necrotizing Enterocolitis in Small-for-Gestational-Age Neonates: A Matched Case-Control Study

Neonatology ◽  
2014 ◽  
Vol 105 (1) ◽  
pp. 74-78 ◽  
Author(s):  
Isabelle M.C. Ree ◽  
Vivianne E.H.J. Smits-Wintjens ◽  
Esther G.J. Rijntjes-Jacobs ◽  
Iris C.M. Pelsma ◽  
Sylke J. Steggerda ◽  
...  
Keyword(s):  
Necrotizing Enterocolitis ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Case Control Study ◽  
Case Control ◽  
Matched Case ◽  
Matched Case Control Study ◽  
Control Study

scholarly journals Matched versus Unmatched Analysis of Matched Case-Control Studies

2021 ◽  
Author(s):  
Fei Wan ◽  
Graham A Colditz ◽  
Siobhan Sutcliffe
Keyword(s):  
Logistic Regression ◽  
Functional Form ◽  
Conditional Logistic Regression ◽  
Control Sample ◽  
Target Population ◽  
Case Control ◽  
Model Specification ◽  
Exact Matching ◽  
Case Control Studies ◽  
Matched Case

Abstract Although the need for addressing matching in the analysis of matched case-control studies is well established, debate remains as to the most appropriate analytic method when matching on at least one continuous factor. We compare the bias and efficiency of unadjusted and adjusted conditional logistic regression (CLR) and unconditional logistic regression (ULR) in the setting of both exact and non-exact matching. To demonstrate that case-control matching distorts the association between the matching variables and the outcome in the matched sample relative to the target population, we derive the logit model for the matched case-control sample under exact matching. We conduct simulations to validate our theoretical conclusions and to explore different ways of adjusting for the matching variables in CLR and ULR to reduce biases. When matching is exact, CLR is unbiased in all settings. When matching is not exact, unadjusted CLR tends to be biased and this bias increases with increasing matching caliper size. Spline smoothing of the matching variables in CLR can alleviate biases. Regardless of exact or non-exact matching, adjusted ULR is generally biased unless the functional form of the matched factors is modelled correctly. The validity of adjusted ULR is vulnerable to model specification error. CLR should remain the primary analytic approach.

Dysglycaemia in small-for-gestational-age neonates: a matched case–control study in monochorionic twins

2015 ◽  
Vol 29 (13) ◽  
pp. 2114-2119 ◽  
Author(s):  
Claudia D. E. de Bruin ◽  
N. Margreth van der Lugt ◽  
Remco Visser ◽  
Wilma Oostdijk ◽  
Erik W. van Zwet ◽  
...  
Keyword(s):  
Gestational Age ◽  
Small For Gestational Age ◽  
Case Control Study ◽  
Case Control ◽  
Monochorionic Twins ◽  
Matched Case ◽  
Matched Case Control Study ◽  
Control Study

scholarly journals Maternal seafood intake and the risk of small for gestational age newborns: a case–control study in Spanish women

BMJ Open ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. e020424 ◽  
Author(s):  
Carmen Amezcua-Prieto ◽  
Juan Miguel Martínez-Galiano ◽  
Inmaculada Salcedo-Bellido ◽  
Rocío Olmedo-Requena ◽  
Aurora Bueno-Cavanillas ◽  
...  
Keyword(s):  
Gestational Age ◽  
Small For Gestational Age ◽  
Low Birthweight ◽  
Case Control Study ◽  
Conditional Logistic Regression ◽  
Case Control ◽  
Spanish Women ◽  
History Of ◽  
Index Weight ◽  
Control Study

ObjectiveTo investigate the relationship between seafood consumption during pregnancy and the risk of delivering a small for gestational age (SGA) newborn.DesignThis case–control study included women with SGA newborns and controls matched 1:1 for maternal age (±2 years) and hospital.SettingFive hospitals in Eastern Andalusia, Spain.Participants518 pairs of pregnant Spanish women. The SGA group included women who delivered SGA newborns: SGA was defined as a birth weight below the 10th percentile of infants at a given gestational age. Controls were women who delivered newborns with adequate birth weights.InterventionsWe collected data on demographic characteristics, socioeconomic status, toxic habits and diet. Midwives administered a 137-item Food Frequency Questionnaire.Outcome measuresWe calculated quintiles of seafood intake and applied conditional logistic regression to estimate ORs and 95% CIs.ResultsShellfish intake more than once/week yielded a significant protective effect against an SGA newborn (OR 0.25, 95% CI 0.08 to 0.76, after adjusting for energy, educational level, smoking, prepregnancy body mass index, weight and a history of preterm or low birthweight newborn). The risk of an SGA newborn was lower among women who consumed >29 g/day fish compared with women who consumed ≤8 g (adjusted OR 0.63, 95% CI 0.41 to 0.98; p=0.025 for a trend). Similarly, the risk of an SGA newborn was lower among women who consumed >1 g/day of marine n-3 polyunsaturated fatty acids compared with those who consumed ≤0.4 g/day (adjusted OR 0.58, 95% CI 0.38 to 0.90; p=0.025 for a trend).ConclusionAn average seafood intake of at least 29 g/day during pregnancy, equivalent to 2–3 servings/week, reduced the risk of an SGA newborn, compared with an average seafood intake of less than 8 g/day.

scholarly journals Role of ivermectin in the prevention of SARS-CoV-2 infection among healthcare workers in India: A matched case-control study

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0247163
Author(s):  
Priyamadhaba Behera ◽  
Binod Kumar Patro ◽  
Arvind Kumar Singh ◽  
Pradnya Dilip Chandanshive ◽  
Ravikumar S. R. ◽  
...  
Keyword(s):  
Vitamin C ◽  
Healthcare Workers ◽  
Case Control Study ◽  
Infection Type ◽  
Conditional Logistic Regression ◽  
Case Control ◽  
Logistic Regression Models ◽  
Matched Case ◽  
Matched Case Control Study ◽  
Control Study

Background Ivermectin is one among several potential drugs explored for its therapeutic and preventive role in SARS-CoV-2 infection. The study was aimed to explore the association between ivermectin prophylaxis and the development of SARS-CoV-2 infection among healthcare workers. Methods A hospital-based matched case-control study was conducted among healthcare workers of AIIMS Bhubaneswar, India, from September to October 2020. Profession, gender, age and date of diagnosis were matched for 186 case-control pairs. Cases and controls were healthcare workers who tested positive and negative, respectively, for COVID-19 by RT-PCR. Exposure was defined as the intake of ivermectin and/or hydroxychloroquine and/or vitamin-C and/or other prophylaxis for COVID-19. Data collection and entry was done in Epicollect5, and analysis was performed using STATA version 13. Conditional logistic regression models were used to describe the associated factors for SARS-CoV-2 infection. Results Ivermectin prophylaxis was taken by 76 controls and 41 cases. Two-dose ivermectin prophylaxis (AOR 0.27, 95% CI, 0.15–0.51) was associated with a 73% reduction of SARS-CoV-2 infection among healthcare workers for the following month. Those involved in physical activity (AOR 3.06 95% CI, 1.18–7.93) for more than an hour/day were more likely to contract SARS-CoV-2 infection. Type of household, COVID duty, single-dose ivermectin prophylaxis, vitamin-C prophylaxis and hydroxychloroquine prophylaxis were not associated with SARS-CoV-2 infection. Conclusion Two-dose ivermectin prophylaxis at a dose of 300 μg/kg with a gap of 72 hours was associated with a 73% reduction of SARS-CoV-2 infection among healthcare workers for the following month. Chemoprophylaxis has relevance in the containment of pandemic.

scholarly journals Neurological maturation in the first semester of life in small for gestation age infants

2007 ◽  
Vol 65 (2A) ◽  
pp. 212-217
Author(s):  
Ana Maria L.B. Almeida-Basso ◽  
Newra Tellechea Rotta
Keyword(s):  
Gestational Age ◽  
Small For Gestational Age ◽  
Case Control ◽  
University Hospital ◽  
Case Control Studies ◽  
Anthropometric Data ◽  
First Semester ◽  
Gestation Age ◽  
Neurological Exam ◽  
Epidemiologic Characteristics

Our aim was to evaluate the acquisition of neuropsychomotor development marks in small for gestational age infants during the first six months of life. A non-controlled cross-section study with thirty full-term newborn small for gestational age infants was performed in a University Hospital in the Southern region of Brazil. These infants were followed up during six months and compared with literature data regarding adequate to gestational age newborn babies. Anthropometric data, epidemiologic characteristics, neurological exam and neuropsychomotor evolution were analyzed. There were significant variations in the acquisition of abilities, as the cephalic support at 3 months of age and delay in lalation. In other aspects, babies born small for gestational age evoluted in a similar way as newborn ones standards. It is suggested that case control studies are performed aiming at deepening the analysis of these studies.

Sign in / Sign up

Export Citation Format

Share Document