The evaluation of a health education campaign on the use of leave from work during pregnancy

BMC Public Health

Table 2 Comparison of two linear regression coefficients

TERMS	Regression coefficient (b)	Standard error (SE(b))	T test (b/SE(b))	p-value	95% Confidence Interval
Calendar year	0.008	0.004	2.3	0.042	0.0003 to 0.016
Dummy variable	-75.73	9.99	-7.58	0.001	-97.72 to -53.75
Product	0.038	0.005	7.58	0.001	0.027 to 0.049
Constant	-16.09	7.03	-2.29	0.043	-31.56 to -0.61

Dependent variable = ratio B/A♦. Predictor variables (TERMS): calendar years; a dummy variable (being 0 for the baseline period and 1 for the second period); the product of dummy with calendar years.
♦ "B" includes cases allowed by Provincial Work Directorate under Letter b) and c) of Article 17, Law 151/2001; "A" includes cases allowed by Provincial Work Directorate under Letter a) of Art. 17, Law 151/2001

ISSN: 1471-2458