library(gtsummary)
library(dplyr)
## 
## Attaching package: 'dplyr'
## The following objects are masked from 'package:stats':
## 
##     filter, lag
## The following objects are masked from 'package:base':
## 
##     intersect, setdiff, setequal, union
data("trial")
trial %>% 
  tbl_summary()
Characteristic N = 2001
Chemotherapy Treatment
    Drug A 98 (49%)
    Drug B 102 (51%)
Age 47 (38, 57)
    Unknown 11
Marker Level (ng/mL) 0.64 (0.22, 1.41)
    Unknown 10
T Stage
    T1 53 (27%)
    T2 54 (27%)
    T3 43 (22%)
    T4 50 (25%)
Grade
    I 68 (34%)
    II 68 (34%)
    III 64 (32%)
Tumor Response 61 (32%)
    Unknown 7
Patient Died 112 (56%)
Months to Death/Censor 22.4 (15.9, 24.0)
1 n (%); Median (Q1, Q3)
trial1 <-  trial %>% 
  select(trt, age, grade)
trial1
trial2 <- trial %>% 
select(trt, age, grade)
trial2 %>% 
tbl_summary()
Characteristic N = 2001
Chemotherapy Treatment
    Drug A 98 (49%)
    Drug B 102 (51%)
Age 47 (38, 57)
    Unknown 11
Grade
    I 68 (34%)
    II 68 (34%)
    III 64 (32%)
1 n (%); Median (Q1, Q3)