“…The data was based on comparative studies of TB population from China , two from Malaysia [18,23], five from India [14,15,29,[35][36][37][38], four from Canada [5,24,25,30] one form each UK [17] Pakistan [35], Spain [36] Taiwan [28] South Africa [37] and Turkey [39]. Among the selected articles fourteen studies were cross sectional [5,14,26,27,30,33,[34][35][36][37][38][39][40] and sixteen were prospective cohort based studies [15][16][17][18][19][20][21][22][23][24][25][26]29,31,32,41]. An article published by Chamla et al …”