To examine activity patterns of individuals, we included day-type (weekday vs. weekend), season (May to October defined as warm season vs. November to April as cool season, according to the climate in California), the time variable (1st-6th wave), sex, and age as covariates in the model.
The poor outcome (PO) at 1 month, defined as a modified Rankin Scale score of 3-6, was the primary end point.
Wind speed data reveal that the windy months in Waterloo are from November to April, defined as the Cold Season in this study, with February being the windiest month.
The unit of analysis was the patient care unit-month (abbreviated as unit-month) defined as data aggregated by month for each patient care unit.
The patient care unit-month, defined as data aggregated by month for each patient care unit, was the unit of analysis (N = 1063).
The primary outcome is continuous abstinence from smoking at one month, defined as not smoking more than five cigarettes since quit date.
If there was disease activity on OCT, defined as presence of any subretinal and/or intraretinal fluid, ranibizumab would be given.
Nest counts were made during the primary nesting season, from 1st March (defined as day 0) until 15 September 1987 or 31 December 2002.
Physical activity (none, 1 4 times a month, or more than 4 times a month) defined as taking part in any sports, exercises, or vigorous leisure activities in the month preceding the interview at both 43 and 53 years.
Season was included as a time-dependent predictor of mortality, with the period December to March defined as winter, in line with standard United Kingdom definitions for examination of seasonal mortality (17).
