A M Stolwijk
Biographic Data
| ID | 6170779 |
|---|---|
| NAME | A M Stolwijk |
| GIVEN NAMES | A M |
| FAMILY NAME | Stolwijk |
| SIGNATURE | STOLWIJK A M |
| AFFILIATIONS | Radboud University Nijmegen |
| VERIFIED | No |
| TOTAL WORKS | 2 |
| TOTAL CITATIONS | 20 |
| WORKS AS AUTHOR | 2 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1997 |
| LATEST PUBLICATION YEAR | 1999 |
| H-INDEX | 1 |
Studying seasonality by using sine and cosine functions in regression analysis
STUDY OBJECTIVE: A statistical test that allows for adjustment of confounding can be helpful for the study of seasonal patterns. The aim of this article is to supply a detailed description of such a method. An example of its application is given. DESIGN: A statistical test is presented that retains the information on the connection of time periods by describing the seasonal pattern as one sine and one cosine function. Such functions can be includ…
Seasonal variation in the prevalence of Down syndrome at birth
STUDY OBJECTIVE: Many studies on seasonality in Down syndrome (DS) have been performed and have come to different conclusions. It is suggested that seasonal variation in hormone production by the hypothalamus-pituitary-ovarian axis just before ovulation leads to seasonality in conception rates of DS. This study aimed to determine whether there is seasonal variation in the prevalence of DS at birth as a proxy for seasonality in DS at conception. D…
Studying seasonality by using sine and cosine functions in regression analysis
STUDY OBJECTIVE: A statistical test that allows for adjustment of confounding can be helpful for the study of seasonal patterns. The aim of this article is to supply a detailed description of such a method. An example of its application is given. DESIGN: A statistical test is presented that retains the information on the connection of time periods by describing the seasonal pattern as one sine and one cosine function. Such functions can be includ…
Seasonal variation in the prevalence of Down syndrome at birth
STUDY OBJECTIVE: Many studies on seasonality in Down syndrome (DS) have been performed and have come to different conclusions. It is suggested that seasonal variation in hormone production by the hypothalamus-pituitary-ovarian axis just before ovulation leads to seasonality in conception rates of DS. This study aimed to determine whether there is seasonal variation in the prevalence of DS at birth as a proxy for seasonality in DS at conception. D…
Studying seasonality by using sine and cosine functions in regression analysis
STUDY OBJECTIVE: A statistical test that allows for adjustment of confounding can be helpful for the study of seasonal patterns. The aim of this article is to supply a detailed description of such a method. An example of its application is given. DESIGN: A statistical test is presented that retains the information on the connection of time periods by describing the seasonal pattern as one sine and one cosine function. Such functions can be includ…
Seasonality (2 works) · Biology (1 work) · Demography (1 work) · Disability Rights and Representation (1 work) · Down syndrome and intellectual disability research (1 work) · Ecology (1 work) · Ecology (1 work) · Geometry (1 work) · Gestation (1 work) · Mathematics (1 work)