Table 3. Adjusted and unadjusted odds ratios against the risk factors.

Risk factors	Unadjusted odds ratio (95% CI)	Adjusted odds ratio (95% CI)
Social distancing of six feet or more
Almost always (more than 90%)	1	1
Commonly (about 50%)	0.32 (0.10-0.97)	0.15 (0.07-0.32)
Sometimes (about 25%)	0.40 (0.01- 0.21)	0.08 (0.03-0.19)
Rarely (less than 10%)	0.20 (0.03-1.21)	0.15 (0.05-0.46)
Hand hygiene frequency
Once every hour	1	1
Every 2-3 hourly	0.80 (0.24-2.68)	0.36 (0.15-0.82)
Every 3-4 hourly	0.35 (0.11-1.10)	0.08 (0.03-0.22)
Less than that	0.25 (0.07-0.80)	0.14 (0.06-0.34)
Ensuring N-95 mask fitness	2.04 (0.83-4.99)	0.35 (0.18-0.66)
Resident doctors	0.27 (0.05-1.34)	0.39 (0.19-0.79)