Table 4.

Baseline characteristics (measured <18 wks of pregnancy) of the study sample, and for participants who visited the intervention versus those who did not (part 2)

Sociodemographic variables (scale)	Total sample intervention group (N=586), mean (SD)	DA visited at least once (n=463), mean (SD)	DA not visited (n=123), mean (SD)	t testa (df)	Cohen d (95% CI)	P value
Age (years)	32.21 (4.04)	32.22 (4.03)	32.18 (4.10)	–0.10 (189.51)	–0.01 (–0.21 to 0.19)	.92
Religion (1-7)	2.06 (1.29)	2.04 (1.29)	2.13 (1.31)	0.70 (189.22)	0.07 (–0.13 to 0.27)	.48
Intention to accept MPVb (1-5)	4.61 (0.73)	4.62 (0.70)	4.56 (0.83)	–0.81 (170.86)	–0.09 (–0.29 to 0.11)	.42
Attitude MPV (1-5)	4.61 (0.65)	4.63 (0.61)	4.54 (0.78)	–1.12 (163.84)	–0.13 (–0.33 to 0.07)	.26
Beliefs safety (1-5)	4.41 (0.81)	4.19 (1.01)	4.21 (1.01)	–2.63 (159.54)	–0.32 (–0.52 to –0.12)	<.01
Beliefs effectiveness (1-5)	4.58 (0.59)	4.61 (0.53)	4.46 (0.78)	–2.03 (152.91)	–0.26 (–0.46 to –0.06)	.04
Perceived severity (1-5)	4.38 (0.66)	4.40 (0.64)	4.34 (0.72)	–0.75 (175.55)	–0.08 (–0.28 to 0.12)	.45
Perceived susceptibility (1-5)	2.63 (0.80)	2.59 (0.77)	2.80 (0.86)	2.53 (178.42)	0.27 (0.07 to 0.47)	.01
Moral norm (1-5)	4.31 (0.82)	4.31 (0.81)	4.30 (0.88)	–0.12 (180.04)	–0.01 (–0.21 to 0.19)	.91
Knowledge (1-5)	4.68 (1.53)	4.70 (1.52)	4.62 (1.57)	–0.53 (187.15)	–0.06 (–0.25 to 0.14)	.60
Perceived control (1-5)	4.67 (0.48)	4.68 (0.46)	4.60 (0.55)	–1.49 (168.62)	–0.17 (–0.37 to 0.03)	.14
Injunctive norm (1-5)	4.09 (0.98)	4.14 (0.93)	3.91 (1.13)	–2.00 (167.86)	–0.23 (–0.43 to –0.03)	.05
Affect (1-5)	4.39 (0.78)	4.40 (0.77)	4.36 (0.82)	–0.46 (184.28)	–0.05 (–0.25 to 0.15)	.65
Decisional certainty (1-5)	4.39 (0.95)	4.39 (0.95)	4.40 (0.96)	0.13 (189.78)	0.01 (–0.19 to 0.21)	.90

^aIndependent sample t test.

^bMPV: maternal pertussis vaccination.