Table 3.

Models of the Relationship Between Perceived Norms and the Hazard of Non-Marital Unintended Pregnancy

	Zero Parity (no prior births)			Parity one (one prior birth)
	1†	2	3	4†	5	6
Injunctive (approval)
Parents
Sex	1.01 (.10)	0.96 (.10)	0.94 (.10)	1.42** (.20)	1.34* (.18)	1.34* (.18)
Birth Control	0.97 (.09)	1.00 (.10)	1.02 (.10)	1.18 (.21)	1.09 (.16)	1.08 (.16)
Baby	1.16* (.09)	1.07 (.09)	1.08 (.09)	1.33* (.20)	1.33* (.20)	1.33* (.20)
Friends
Sex	0.85 (.09)	0.86 (.09)	0.85 (.09)	1.03 (.16)	1.12 (.16)	1.14 (.16)
Birth Control	0.81* (.08)	0.88 (.09)	0.90 (.10)	1.02 (.15)	1.10 (.15)	1.11 (.15)
Baby	1.23** (.10)	1.19* (.11)	1.18* (.11)	0.94 (.14)	0.76 (.11)	0.75 (.11)
Descriptive (prevalence)
Adults
Single motherhood in community	0.99 (.10)	0.93 (.10)	0.93 (.10)	1.29 (.26)	1.36* (.25)	1.36* (.24)
Friends
Sex	1.28* (.15)	1.33** (.16)	1.35** (.16)	0.85 (.19)	0.95 (.19)	0.96 (.19)
Birth Control	0.89 (.08)	0.89 (.08)	0.90 (.08)	0.87 (.14)	0.82 (.11)	0.81 (.11)
Baby	1.14 (.11)	1.04 (.10)	1.04 (.10)	0.65 (.11)	0.62 (.10)	0.62 (.10)
Mechanisms: Respondent Attitudes
Sex			1.04 (.17)			0.69 (.19)
Birth Control			0.80 (.13)			0.91 (.22)
Baby			0.94 (.17)			1.38 (.39)
Constant		0.02 (.11)	0.08 (.42)		0.00 (.00)	0.00 (.00)
Chi square		102.8	102.04		46.73	49.11
p		0.00	0.00		0.03	0.05
Log likelihood		−676.23	−675.13		−239.12	−237.59
Person weeks	43853	43853	43853	4883	4883	4883

Notes: Columns 2–3 and 5–6 each represent a logistic regression model. Results are presented as odds ratios. Standard errors in parentheses. Each model controls for relationship, socio-demographic characteristics, prior related experiences, months in study, months in study squared, and number of completed surveys. These controls are not presented for parsimony.

^†These columns present the results of twenty separate models -- each model includes a single measure of a perceived norm, and the control variables.

^*p < .05;

^**p < .01;

^***p < .001; one-tailed tests