Table 3.

Factors potentially affecting yield of intensified case screening in populations with individuals infected with HIV

	Slope (95% CI) in univariate analysis	p value in univariate analysis	Slope (95% CI) in multivariate analysis	p value in multivariate analysis
Country prevalence of tuberculosis*	1·1 (0·2 to 2·0)	0·02	1 (0·1 to 1·9)	0·03
Country prevalence of HIV†	1·3 (−17·5 to 43·1)	0·4	..	..
Availability of culture‡	2·0 (−2·7 to 6·7)	0·39	..	..
Symptom screening§	4·3 (0·34 to 8·2)	0·03	3·7 (0·05 to 7·4)	0·05

^*One unit increase=100 cases of tuberculosis per 100 000 people.

^†One unit increase=10% increase in prevalence.

^‡Coded as 0 if no culture available or 1 if culture available.

^§Coded as 0 if symptom screening used to identify people suspected to have tuberculosis or 1 if all individuals screened with sputum smears or culture.