Stratify descriptive table in stratas.
strataTable.RdThis functions re-build a descriptive table in stratas defined by a variable.
Arguments
- x
an object of class 'createTable'
- strata
character specifying the name of the variable whose values or levels defines strata.
- strata.names
character vector with as many components as stratas, or NULL (default value). If NULL, it takes the names of levels of strata variable.
- max.nlevels
an integer indicating the maximum number of unique values or levels of strata variable. Default value is 5.
References
Isaac Subirana, Hector Sanz, Joan Vila (2014). Building Bivariate Tables: The compareGroups Package for R. Journal of Statistical Software, 57(12), 1-16. URL https://www.jstatsoft.org/v57/i12/.
Examples
require(compareGroups)
# load REGICOR data
data(regicor)
# compute the descriptive tables (by year)
restab <- descrTable(year ~ . - id - sex, regicor, hide.no="no")
# re-build the table stratifying by gender
strataTable(restab, "sex")
#>
#> --------Summary descriptives table ---------
#>
#> _____________________________________________________________________________________________________________________________________________
#> Male Female
#> _____________________________________________ _____________________________________________
#> 1995 2000 2005 p.overall 1995 2000 2005 p.overall
#> N=206 N=390 N=505 N=225 N=396 N=572
#> ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
#> Age 54.1 (11.8) 54.3 (11.2) 55.4 (10.7) 0.212 54.1 (11.7) 54.4 (11.2) 55.2 (10.6) 0.351
#> Smoking status: <0.001 <0.001
#> Never smoker 52 (26.5%) 112 (29.7%) 137 (27.5%) 182 (83.1%) 302 (79.3%) 416 (74.0%)
#> Current or former < 1y 77 (39.3%) 199 (52.8%) 134 (26.9%) 32 (14.6%) 68 (17.8%) 83 (14.8%)
#> Former >= 1y 67 (34.2%) 66 (17.5%) 227 (45.6%) 5 (2.28%) 11 (2.89%) 63 (11.2%)
#> Systolic blood pressure 134 (18.4) 137 (19.3) 132 (18.7) 0.002 132 (19.8) 129 (22.6) 127 (20.5) 0.008
#> Diastolic blood pressure 79.0 (9.27) 83.0 (9.54) 81.7 (10.8) <0.001 75.2 (11.3) 78.6 (10.6) 78.3 (10.0) <0.001
#> History of hypertension 50 (24.3%) 110 (28.2%) 181 (36.2%) 0.002 61 (27.1%) 123 (31.1%) 198 (34.8%) 0.097
#> Hypertension treatment 31 (15.0%) 48 (12.3%) 110 (22.8%) <0.001 40 (17.8%) 79 (19.9%) 120 (21.7%) 0.446
#> Total cholesterol 224 (43.9) 224 (43.9) 210 (40.3) <0.001 226 (42.4) 224 (44.9) 216 (50.3) 0.004
#> HDL cholesterol 46.5 (13.1) 47.3 (12.6) 48.1 (12.4) 0.290 56.9 (13.9) 57.4 (16.7) 57.8 (14.2) 0.783
#> Triglycerides 131 (91.5) 128 (81.1) 132 (90.3) 0.817 97.8 (47.9) 99.7 (55.1) 104 (57.6) 0.281
#> LDL cholesterol 153 (39.6) 152 (39.1) 137 (36.0) <0.001 150 (37.3) 146 (38.0) 136 (42.6) <0.001
#> History of hyperchol. 48 (23.3%) 138 (35.8%) 167 (33.2%) 0.007 49 (21.8%) 118 (30.6%) 189 (33.3%) 0.006
#> Cholesterol treatment 17 (8.25%) 38 (9.84%) 59 (12.2%) 0.256 11 (4.89%) 30 (7.75%) 73 (13.2%) <0.001
#> Height (cm) 170 (7.34) 168 (7.17) 170 (7.43) 0.021 158 (6.31) 156 (6.50) 158 (6.24) <0.001
#> Weight (Kg) 77.6 (11.7) 80.1 (12.3) 80.2 (11.6) 0.023 67.3 (11.3) 67.6 (12.6) 67.7 (13.0) 0.919
#> Body mass index 26.9 (3.64) 28.2 (3.89) 27.9 (3.58) <0.001 27.2 (4.57) 28.0 (5.25) 27.3 (5.39) 0.084
#> Physical activity (Kcal/week) 422 (418) 356 (362) 439 (467) 0.014 553 (412) 486 (382) 273 (253) <0.001
#> Physical component 50.1 (6.71) 50.9 (8.58) 51.5 (8.07) 0.110 48.6 (9.16) 47.1 (10.2) 48.9 (9.45) 0.027
#> Mental component 52.1 (9.67) 50.9 (10.2) 49.2 (9.67) 0.001 46.5 (12.2) 46.9 (11.3) 44.7 (11.2) 0.017
#> Cardiovascular event 6 (3.06%) 21 (5.74%) 19 (3.96%) 0.272 4 (1.98%) 14 (3.73%) 28 (5.15%) 0.139
#> Days to cardiovascular event or end of follow-up 1718 (1127) 1646 (1076) 1830 (1064) 0.046 1848 (1075) 1724 (1083) 1761 (1079) 0.421
#> Overall death 12 (6.45%) 46 (12.5%) 29 (6.08%) 0.002 6 (2.99%) 35 (9.43%) 45 (8.24%) 0.018
#> Days to overall death or end of follow-up 1690 (1031) 1664 (1034) 1682 (1027) 0.952 1735 (1055) 1684 (1067) 1825 (1075) 0.139
#> ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯