Table 2.

Comparison of different tiers of public and private laboratories for biosafety engineered devices

Characteristics	Class of laboratory	Public laboratories		Private laboratories		OR	95% CI	p
		N1	No. with device (%)	N2	No. with device (%)
Isolated micro lab	Tertiary	4	4 (100.0)	2	2 (100.0)	—	—	—
	Secondary	14	8 (57.1)	22	1 (4.5)	28.000	2.896–270.60	0.007
	Primary	13	1 (7.7)	25	1 (4.0)	2.000	0.115–34.84	1.000
Leak-proof benches	Tertiary	4	4 (100.0)	2	2 (100.0)	—	—	—
	Secondary	14	14 (100.0)	22	13 (59.1)	20.407	1.079–385.86	0.006
	Primary	13	6 (46.2)	25	18 (72.0)	3.000	0.740–12.130	0.163
Self-closing doors	Tertiary	4	2 (50.0)	2	0 (0.0)	5.000	0.149–166.73	0.467
	Secondary	14	5 (35.7)	22	4 (18.2)	2.500	0.530–11.656	0.267
	Primary	13	0 (0.0)	25	1 (4.0)	0.604	0.023–15.911	1.000
Emergency exit	Tertiary	4	1 (25.0)	2	0 (0.0)	2.143	0.059–77.605	1.000
	Secondary	14	0 (0.0)	22	0 (0.0)	—	—	—
	Primary	13	0 (0.0)	25	0 (0.0)	—	—	—
Hand washing sink	Tertiary	4	4 (100.0)	2	2 (100.0)	—	—	—
	Secondary	14	14 (100.0)	22	18 (81.8)	2.189	0.0987–48.536	1.000
	Primary	13	9 (69.2)	25	7 (28.0)	5.786	1.335–25.074	0.019
Autoclave	Tertiary	4	4 (100.0)	2	2 (100.0)	—	—	—
	Secondary	14	14 (100.0)	22	15 (68.2)	14.032	0.733–208.54	0.028
	Primary	13	13 (100.0)	25	18 (72.0)	10.940	0.5740–208.75	0.072
Fire extinguisher	Tertiary	4	2 (50.0)	2	1 (50.0)	—	—	—
	Secondary	14	4 (28.6)	22	1 (4.5)	8.400	0.827–85.276	0.064
	Primary	13	0 (0.0)	25	1 (4.0)	0.605	0.023–15.911	1.000

CI, confidence interval; micro lab, microbiology laboratory; N₁, number of public laboratories; N₂, number of private laboratories; OR, odds ratio.