Meta-analaysis: heterogeneity

clear
input trial	str16 trialnam	str16 authors	startyr	latitude	cases1	tot1	cases0	tot0
1	"Canada"	"Ferguson & Simes"	1933	55	6	306	29	303
2	"Northern USA"	"Aronson"	1935	52	4	123	11	139
3	"Northern USA"	"Stein & Aronson"	1935	52	180	1541	372	1451
4	"Chicago"	"Rosenthal et al"	1937	42	17	1716	65	1665
5	"Chicago"	"Rosenthal et al"	1941	42	3	231	11	220
6	"Georgia (School)"	"Comstock & Webster"	1947	33	5	2498	3	2341
7	"Puerto Rico"	"Comstock et al"	1949	18	186	50634	141	27338
8	"UK"	"Hart & Sutherland"	1950	53	62	13598	248	12867
9	"Madanapalle"	"Frimont-Moller et al"	1950	13	33	5069	47	5808
10	"Georgia (Community)"	"Comstock et al."	1950	33	27	16913	29	17854
11	"Haiti"	"Vandeviere et al"	1965	18	8	2545	10	629
12	"South Africa"	"Coetzee & Berjak"	1965	27	29	7499	45	7277
13	"Madras"	"TB Prevention Trial"	1968	13	505	88391	499	88391
end
gen non1=tot1-cases1
gen non0=tot0-cases0
*1: MH pooled RR meta-analysis
metan cases1 non1 cases0 non0, rr xlab(.1, 1, 10) textsize(150) label (namevar=authors)

labbe cases1 non1 cases0 non0, xlabel(0,0.1,0.2,0.3) ylabel(0,0.1,0.2,0.3) textsize(50) ///
 t1(Impact of BCG in TB infection:) ///
 t2(Propotion of patients with outcome) ///
 l1(Vaccine group) b2(Control group patients) null  graphregion( color(white) ) plotregion(  fcolor(white) )