Table 2

 Bivariate association between family types/parental behaviours and outcomes: girls

ExposuresFirst sexNo contraception at first sexPregnancy
By follow up 1% (n) (n = 448)Between follow up 1 and 2*% (n) (n = 680)Overall OR follow up 1 and 2 combined (95% CI)By follow up 1% (n) (n = 86)Between follow up 1 and 2*% (n) (n = 103)Overall OR follow up 1 and 2 combined (95% CI)By follow up 2% (n) (n = 83)Overall OR follow up 1 and 2 combined (95% CI)
*Of students who had not sex by first follow up.
Number of parents in householdTwo parent11.48 (297)25.69 (447)123.26 (60)15.33 (67)12.86 (58)1
Lone parent17.86 (100)37.11 (141)1.68 (1.42,1.98)17.58 (16)12.86 (18)0.76 (0.55,1.04)3.59 (17)1.26 (0.70,2.28)
Mother’s age at participant’s birth⩾2012.79 (359)27.72 (547)120.19 (63)14.53 (78)12.88 (67)1
<2022.60 (33)50.00 (44)2.13 (1.49,3.04)25.00 (8)15.37 (61)1.45 (0.70,3.03)5.79 (7)2.02 (0.89,4.58)
Parental attitude to going outMuch more/a little more strict12.81 (128)26.38 (187)118.97 (22)14.52 (27)12.91 (24)1
About the same as others11.09 (141)27.74 (253)0.97 (0.83,1.14)24.80 (31)14.98 (37)1.20 (0.80,1.79)2.78 (29)0.95 (0.51,1.77)
Much more/a bit more easy going16.75 (134)32.83 (173)1.38 (1.16,1.65)17.54 (20)15.88 (27)1.04 (0.68,1.61)3.07 (21)1.06 (0.58,1.92)
Difficulty of parent-child communicationEasy12.94 (297)26.22 (404)120.61 (54)15.37 (61)12.24 (40)1
Difficult12.73 (120)30.70 (210)1.13 (0.98,1.30)22.86 (24)14.56 (30)1.00 (0.68,1.49)4.39 (37)2.02 (1.31,3.10)
Parental involvement in sex educationYes12.57 (235)26.34 (260)119.63 (42)13.39 (34)12.81 (32)1
No13.41 (185)28.54 (353)1.12 (0.97,1.29)22.86 (24)16.67 (58)1.27 (0.86,1.87)3.03 (45)1.07 (0.73,1.55)
Housing tenurePrivately owned10.16 (214)26.46 (407)120.00 (61)15.04 (60)12.44 (43)1
Non-Privately owned22.08 (159)35.90 (154)1.95 (1.62,2.34)31.82 (14)15.79 (24)1.18 (0.83,1.69)4.64 (27)1.99 (1.17,3.38)
Parental EmploymentOne or more11.95 (342)27.65 (563)120.00 (61)15.50 (86)12.84 (68)1
Neither21.40 (55)30.19 (48)1.55 (1.11,2.17)31.82 (14)17.39 (8)1.60 (0.96,2.59)2.94 (6)1.03 (0.52,2.05)