Table 2.

Multivariable linear regression analyses modeling the effects of cigarette smoking frequency and quantity on CD4+ cell count (cells/mL; N = 151)^*

Predictor	Unstandardized b	SE	t	p
2a. Cigarette smoking frequency
Number of days smoking: Past month
Infrequent: < 20 days	Reference^a
Regular: ≥ 20 days	−25.5	44.9	−.57	.57

2b. Cigarette smoking quantity
Average number of cigarettes per day: Past month
Light: < 10 cigarettes	Reference^a
Moderate/Heavy: ≥ 10 Cigarettes	−58.3	37.1	−1.6	.12

Notes:

: Analyses control for self-reported antiretroviral adherence and number of years since HIV diagnosis, which were included in the models as continuous measures.

SE: Standard Error;

: The reference group is the group against which the other category is compared.