Description
dat_map$continent = c("Oceania", "Asia", "America", "America", "Asia", "Europe", "Africa", "Europe", "Europe", "Europe", "Europe", "Europe", "Oceania", "Europe", "Europe", "Europe", "Africa", "Europe", "America")
continent = dat_map %>%
group_by(continent) %>%
summarise(n_studies = sum(n_studies))
paste0(
# number raw data
"Among them, we were able to access the data of ",
length(unique(dat_mod[dat_mod$raw_data == "YES", ]$study_ID)),
# number of unique studies
" unique studies. Out of the ",
length(unique(dat_mod$study_ID)),
# number of participants
" studies (n=",
sum(dat_mod$N),
# countries
" participants), ",
continent[continent$continent=="America", ]$n_studies,
" were conducted in America (",
"among which ",
dat_map[dat_map$COUNTRY=="USA",]$n_studies,
" were conducted in the USA), ",
continent[continent$continent=="Europe", ]$n_studies,
" in Europe, ",
continent[continent$continent=="Oceania", ]$n_studies,
" in Africa, ",
continent[continent$continent=="Asia", ]$n_studies,
" in Asia, and ",
continent[continent$continent=="Africa", ]$n_studies,
# variability participants
" in Oceania. The number of participants per study ranged from ",
min(as.numeric(dat_mod$N)),
" to ",
max(as.numeric(dat_mod$N)),
". The median length of follow up ranged from ",
min(as.numeric(dat_mod$followupduration)),
" years to ",
round(max(as.numeric(dat_mod$followupduration))),
" years (median=",
round(median(as.numeric(dat_mod$followupduration))),
" years, IQR=",
round(IQR(as.numeric(dat_mod$followupduration))),
" years). Among the ",
sum(dat_prim[!duplicated(dat_prim$study_ID),]$Cut_off_date=="Official"),
" studies included in our main analyses, ",
sum(dat_prim[!duplicated(dat_prim$study_ID),]$diag.procedure=="Diagnosis"),
" studies categorized ADHD using a formal diagnostic procedure, ",
sum(dat_prim[!duplicated(dat_prim$study_ID),]$diag.procedure=="Symptoms"),
" based on symptoms count, and ",
sum(dat_prim[!duplicated(dat_prim$study_ID),]$diag.procedure=="Broad-based-scale"),
" based on the results of broad-based scales (such as the CBCL or SDQ)."
)
## [1] "Among them, we were able to access the data of 33 unique studies. Out of the 57 studies (n=6504 participants), 25 were conducted in America (among which 22 were conducted in the USA), 22 in Europe, 5 in Africa, 3 in Asia, and 2 in Oceania. The number of participants per study ranged from 10 to 813. The median length of follow up ranged from 4 years to 33 years (median=7 years, IQR=4 years). Among the 41 studies included in our main analyses, 20 studies categorized ADHD using a formal diagnostic procedure, 13 based on symptoms count, and 8 based on the results of broad-based scales (such as the CBCL or SDQ)."
paste0("Among studies included in the main analyses (n=",
length(unique(dat_prim$Country_only)), " countries, n=",
sum(dat_prim$N), " participants), the median length of follow up ranged from ",
min(as.numeric(dat_prim$followupduration)),
" to ",
max(as.numeric(dat_prim$followupduration)),
" years (",
round(quantile(dat_prim$followupduration, .25)),
"-",
round(quantile(dat_prim$followupduration, .75)),")")
## [1] "Among studies included in the main analyses (n=15 countries, n=4708 participants), the median length of follow up ranged from 4 to 33.035446 years (6-9)"