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Table 1 All variables in final mixed-effect regression model

From: Does sunlight drive seasonality of TB in Vietnam? A retrospective environmental ecological study of tuberculosis seasonality in Vietnam from 2010 to 2015

VariableDefinition
TB incidenceThe number of new cases of TB/quarter/population of the province, in x province (x = 1,2, … 63) at y quarter (y = 1–4, in a given year), LOESS detrended
UrbanProportion of people living in urban compared to rural areas per province per year, LOESS detrended
SexProportion of male to female per province per year, LOESS detrended
Population densityNumber of individuals per province divided by the geographical area of the province, per province per year, LOESS detrended
LiteracyPercentage of literate individuals in those ≥15 years of age per province per year, LOESS detrended
YoungPercentage of population under 20 years of age per province per year, LOESS detrended
OldPercentage of population ≥ 65 years of age per province per year, LOESS detrended
PovertyRatio of the number of people whose income falls below ½ the median income of the country, per province per year, LOESS detrended
HospitalsNumber of hospitals per province per year, LOESS detrended
HIVPrevalence of HIV at 31st December each year, per province, LOESS detrended
migrationRate of in migration into a given province, per province per year, LOESS detrended
quarter1–4, beginning in January grouping into 3 month blocks.
Influenza-Like-IllnessNumber of cases of influenza-like-illness/population of the province, per province per quarter, lagged by two quarter, LOESS detrended
Average temperatureaverage temperature per province per quarter, lagged by two quarters, LOESS detrended
Absolute humidityaverage absolute humidity per province per quarter, lagged by two quarters, LOESS detrended
Rainfallsummed rainfall per province per quarter, lagged by two quarters, LOESS detrended
Sunshinesummed hours of sunlight per province per quarter, lagged by two quarters, LOESS detrended
LatitudeLatitude value of centroid point of province
(1|province)Province as a random effect.
(1|year)Year as a random effect