Table 3. Prevalence and factors associated with interest in performing point-of-care testing for TB in-house among private practitioners in Chennai.

Characteristic*	Interested in POC in-house or on-site (n = 117/228) n/total (%)	Unadjusted PR (95% CI)	P**	Adjusted PR (95% CI)*	P**‡
Gender
Male	75/160 (47)	0.8 (0.6–0.9)	0.01	0.9 (0.8–1.2)	0.61
Female	42/68 (62)	Ref		Ref
Years practicing
≤20 years	65/117 (56)	1.2 (0.9–1.6)	0.23	1.1 (0.9–1.4)	0.33
>20 years	52/111 (47)	Ref		Ref
Practitioner level of training
MD (Chest/Pulmonary specialty)	9/39 (23)	0.4 (0.2–0.8)	<0.01	0.5 (0.2–0.9)	0.03
MBBS/MS/MD (Non-chest specialty)	108/139 (57)	Ref		Ref
Type of facility
Private hospital or nursing home	61/99 (62)	1.4 (1.1–1.8)	<0.01	1.3 (1.1–1.7)	0.01
Private standalone clinic or polyclinic†	56/129 (43)	Ref		Ref
Number of patients diagnosed with TB annually
>12 patients	60/118 (51)	1.0 (0.8–1.3)	0.88	1.1 (0.8–1.4)	0.59
≤12 patients	57/110 (52)	Ref		Ref
Point-of-care testing practices
Any POC diagnostic testing	78/110 (71)	2.1 (1.6–2.8)	<0.001	1.8 (1.4–2.4)	<0.001
No POC testing	39/118 (33)	Ref		Ref
Usage of sputum smear microscopy for TB
Orders at first patient visit for TB diagnosis	54/115 (47)	0.8 (0.6–1.1)	0.23	0.9 (0.7–1.1)	0.35
Not ordered at first patient visit	63/113 (56)	Ref		Ref
Knowledge of serological antibody test ban
Yes	61/126 (48)	0.9 (0.7–1.2)	0.38	0.9 (0.7–1.2)	0.56
No	56/102 (55)	Ref		Ref
Action for pulmonary TB diagnosis
Refer to RNTCP or PPM DOTS center	70/131 (53)	1.1 (0.9–1.4)	0.46	1.2 (1.0–1.5)	0.11
Treatment in private sector	47/97 (49)	Ref		Ref

POC, point-of-care; PR, prevalence ratio.

**P-values were calculated using Poisson regression models with robust standard errors to calculate prevalence ratios.

‡Adjusted for all other variables with data in this column.

†Includes practitioners who practice in government facilities with private practice in the evening.