TABLE 1.
Smell Dysfunction in COVID-19: Chronology of Studies on South Asians with either D614 virus dominance or G614 virus dominance.
| Author | Reference # | Start Data Collection mm dd yy or month and year | End Data Collection mm dd yy or month and year | Ethnicity (Location) North, West, South, East India (N, W, S, E) | Cohort # | Smell Loss Prevalence (%) | Age mean, m median, M | Male Gender (%) | Severe COVID disease (%) | |
|---|---|---|---|---|---|---|---|---|---|---|
| D614 VIRUS DOMINANCE | ||||||||||
| Almazeedi | 42 | 02 24 20 | 04 20 20 | Indian (Kuwait) | 527 | 0.1 | M 41 | 81 | 1.1 | |
| Almazeedi | 42 | 02 24 20 | 04 20 20 | Bangladeshi (Kuwait) | 70 | 0.1 | M 41 | 81 | 5.7 | |
| Varghese | 45 | Feb 2020 | 03 31 20 | S India (Kerala) | 202 | 12 | m 36.5 | 80.2 | 3 | |
| Ish | 46 | 03 01 20 | 04 30 20 | N India (Delhi) | 170 | 4.1 | N D | N D | 0 | |
| Sharma | 47 | 03 20 20 | 04 30 20 | N India (Rajasthan) | 234 | 0.0 | m 35.1 | 64.5 | 0 | |
| Tham | 43 | 03 24 20 | 04 16 20 | Bangladeshi (Singapore) | 568 | 7.74 | m 34 | 87.6 | N D | |
| Tham | 43 | 03 24 20 | 04 16 20 | Indian (Singapore) | 221 | 9.95 | m 34 | 87.6 | N D | |
| Herath | 48 | 03 10 20 | 05 30 20 | Sri Lanka | 431 | 2.3 | m 37 | 78 | 1.2 | |
| Iltaf | 49 | Mar 2020 | Jun 2020 | Pakistan (Karachi) | 350 | 1.4 | m 49.5 | 70 | N D | |
| Lal | 50 | 03 01 20 | 06 30 20 | N India (Delhi) | 435 | 8.0 | m 38.3 | 66.7 | N D | |
| Yadav | 51 | 03 01 20 | 07 05 20 | N India (Punjab) | 152 | 18.4 | m 43 | 51.3 | 0 | |
| Khurana | 52 | Apr 2020 | Apr 2020 | N India (Delhi) | 94 | 3.2 | m 36 | 59.6 | 1 | |
| Lanjiwar | 53 | 04 01 20 | 04 20 20 | N India (Delhi) | 109 | 9.2 | m 38.2 | 86.2 | 0 | |
| Krishnasamy | 54 | Apr 2020 | May 2020 | S India (Tamil Nadu) | 1,263 | 9.4 | M 35 | 66.3 | 10.5 | |
| Smitha | 55 | Apr 2020 | Jun 2020 | S India (Karnataka) | 500 | 13.4 | ~ 40 | 62 | 5 | |
| Makda | 56 | Apr 2020 | Jul 2020 | Pakistan (Karachi) | 114 | 7.8 | m 51 | 54.4 | 54.4 | |
| Soh | 44 | 05 01 20 | 07 01 20 | Indian (Singapore) | 743 | 2.6 | m 35 | 100 | 0 | |
| Soh | 44 | 05 01 20 | 07 01 20 | Bangladeshi (Singapore) | 1,064 | 4.7 | m 35 | 100 | 0 | |
| TOTAL | 6,247 | Mean= 5.3% | Mean= 38.83 | Mean= 75.08 | Mean= 5.85% | |||||
| G614 VIRUS DOMINANCE | ||||||||||
| Al Harthi | 57 | 03 03 20 | 05 09 20 | South Asian (Oman) | 102 | 6.9 | m 26 | 77.5 | 18.6 | |
| Kuchhal | 58 | 04 01 20 | 07 31 20 | N India (Uttarakhand) | 465 | 18.9 | N D | N D | N D | |
| Mishra | 59 | Apr 2020 | May 2020 | W India (Maharashtra) | 74 | 14.8 | ~ 35 | 58.1 | N D | |
| Bhatta | 60 | 04 01 20 | 07 30 20 | W India (Maharashtra) | 600 | 63.7 | m 42.9 | 56.2 | 13.3 | |
| Panda | 61 | 4 23 20 | 06 29 20 | N India (Delhi) | 225 | 22.1 | m 35 | 70.7 | 0 | |
| Chaurasia | 62 | 04 01 20 | 07 31 20 | N India (Uttarakhand) | 465 | 18.9 | N D | N D | N D | |
| Malik | 63 | 04 29 20 | 07 20 20 | Bangladesh | 139 | 38.9 | m 34.1 | 41 | 1 | |
| Shah | 64 | Apr 2020 | Aug 2020 | N India (Srinagar) | 655 | 18.5 | m 32.7 | 63.2 | 0 | |
| Bhattacharjee | 65 | 05 12 20 | 05 21 20 | W India (Maharashtra) | 34 | 15 | m 35 | 61.8 | 0 | |
| Jain | 66 | May 2020 | Jun 2020 | N India (Delhi) | 410 | 22.4 | m 37.2 | 63.9 | 0 | |
| Dev | 67 | 05 01 20 | 06 15 20 | N India (Delhi) | 261 | 21 | m 36 | 58 | 0 | |
| Kumar L | 68 | May 2020 | Aug 2020 | N India (Delhi) | 141 | 24.1 | m 15.2 | 58.9 | 0 | |
| Koul | 69 | 05 15 20 | 08 15 20 | N India (Jammu) | 300 | 42.5 | m 37 | 74 | 0 | |
| Sahoo | 70 | 06 25 20 | 07 24 20 | E India (Odisha) | 718 | 10.7 | m 34 | 78 | 0 | |
| Rajkumar | 71 | 07 06 20 | 07 12 20 | S India (Tamil Nadu) | 230 | 26.9 | m 43.6 | 63 | 0 | |
| Kumar V | 72 | Jun 2020 | Aug 2020 | N India (Delhi) | 200 | 34.0 | m 37.4 | 75.5 | 0 | |
| Kandakure | 73 | Jun 2020 | Sep 2020 | W India (Maharashtra) | 200 | 8.5 | ~ 35 | 54.5 | 0 | |
| Hasan | 74 | Jul 2020 | Sep 2020 | Bangladesh | 600 | 38.7 | m 50.2 | 64 | 0 | |
| Hajare | 75 | Jul 2020 | Sep 2020 | S India (Karnataka) | 167 | 62.9 | m 39 | 54.5 | N D | |
| Thakur | 6 | Sep 2020 | Oct 2020 | S India (Karnataka) | 250 | 71.6 | ~ 44 | 57.6 | 0 | |
| Savtale | 76 | 10 01 20 | 10 15 20 | W India (Maharashtra) | 180 | 55.5 | m 37.8 | 33.4 | 0 | |
| Gupta | 77 | Nov 2020 | Nov 2020 | N India (Rajasthan) | 98 | 86.5 | m 41.4 | 49 | 0 | |
| Mangal | 78 | 11 16 20 | 11 26 20 | W India (Maharashtra) | 57 | 17.7 | ~ 35 | N D | 0 | |
| Karthikeyan | 79 | Aug 2020 | Dec 2020 | S India (Tamil Nadu) | 1,000 | 74.2 | m 42.4 | 59.6 * | 0 | |
| Silu | 80 | Sep 2020 | 01 15 21 | N India (Rajasthan) | 2,055 | 43.0 | m 50.4 | 77.4 | 2.8 | |
| TOTAL | 9,626 | Mean= 31.8% | Mean= 34.32 | Mean= 61.35 | Mean= 1.64% | |||||
Abbreviations: N D, not disclosed; *, 3.2% transgender was assigned 50/50 to male and female gender.
Virus dominance was determined by multiple studies as described in the section “Spatiotemporal mapping of D614 or G614 virus dominance in South Asians”