| S. No. | First Author | Total No. of Subjects | EGFR-positive Subjects | ||
| Females, n (%) | Males, n (%) | Females, n (%) | Males, n (%) | ||
| 1 | Samdariya et al. [49] | 41 (31) | 92 (69) | NA | NA |
| 2 | Rana et al. [50] | 60 (39.5) | 92 (60.5) | 23 (48) | 25 (52) |
| 3 | Bal et al. [28] | NA | NA | 18 (48.6) | 19 (51.4) |
| 4 | Verma et al. [21] | 17 (24.64) | 52 (75.36) | 5 (35.7) | 9 (64.3) |
| 5 | Doval et al. [30] | 163 (32.6) | 337 (67.4) | 68 (41.5) | 96 (59) |
| 6 | Doval et al. [51] | 64 (19.9) | 258 (80.1) | NA | NA |
| 7 | Bhatt et al. [52] | 33 (31.2) | 73 (68.8) | 15 (35.7) | 27 (64.3) |
| 8 | Shankar et al. [53] | 31 (37) | 53 (63) | NA | NA |
| 9 | Singh et al. [20] | 90 (23.2) | 298 (76.8) | 18 (75) | 6 (25) |
| 10 | Ashutosh et al. [36] | 40 (39) | 62 (61) | NA | NA |
| 11 | Sahoo et al. [54] | 97 (44) | 123 (56) | 56 (49.1) | 58 (50.9) |
| 12 | Bala et al. [29] | 100 (28.3) | 253 (71.7) | NA | NA |
| 13 | Jain et al. [25] | 30(36) | 54 (64) | NA | NA |
| 14 | Sharma et al. [19] | 17 (35.4) | 31 (64.6) | 11 (57.9) | 8 (42.1) |
| 15 | Udupa et al. [35] | 20 (24) | 65 (76) | NA | NA |
| 16 | Chatterjee et al. [17] | 54 (26) | 153 (74) | 36 (53.7) | 32 (46.3) |
| 17 | Vaid et al. [27] | 22 (27.5) | 58 (72.5) | NA | NA |
| 18 | Chatterjee et al. [16] | 41 (38.6) | 65 (61.3) | 19 (54.3) | 16 (45.7) |
| 19 | Ansari et al. [55] | 19 (31.2) | 42 (68.8) | NA | NA |
| 20 | Kota et al. [56] | 50 (45) | 61 (55) | 22 (64.7) | 12 (35.3) |
| 21 | Singh et al. [34] | 35 (28) | 90 (72) | 10 (32.3) | 21 (67.7) |
| 22 | Gupta et al. [57] | 13 (27.5) | 35 (72.5) | 6 (26.1) | 17 (73.9) |
| 23 | Noronha et al. [33] | 205 (35.3) | 375 (64.7) | 86 (37.9) | 141 (62.9) |
| 24 | Kasana et al. [32] | 26 (46) | 31 (57) | 14 (70) | 6 (30) |
| 25 | Choughule et al. [18] | 318 (31.2) | 700 (68.8) | 109 (44.5) | 146 (57.3) |
| 26 | Bharadwaj et al. [58] | 16 (26.7) | 44 (73) | 10 (55.6) | 8 (44.4) |
| 27 | Poonamalle et al. [23] | 9 (25.7) | 26 (74.3) | NA | NA |
| 28 | Dutt et al. [24] | 1205 (36) | 2146 (64) | NA | NA |
| 29 | Prabhash et al. [42] | 83 (32.9) | 169 (67.1) | 27 (45.8) | 32 (54.2) |
| 30 | Doval et al. [31] | 55 (33.1) | 111 (66.9) | 18 (41.9) | 25 (58.1) |
| 31 | Dang et al. [59] | NA | NA | NA | NA |
| 32 | Chougule et al. [41] | 265 (29.8) | 642 (70.8) | 79 (37.6) | 131 (62.4) |
| 33 | Noronha et al. [26] | 53 (47.7) | 58 (52.3) | 27 (69.2) | 12 (30.8) |
| 34 | Kumari et al. [60] | 75 (30) | 175 (70) | 30 (37.9) | 49 (62.1) |