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. 2011 Feb 23;88(Suppl 2):318–340. doi: 10.1007/s11524-011-9547-8

Table 6.

Factors associated with sexual debut, independent housing, first union, first child (hazard ratios, Cox models)

Variables Hazard ratios (standard errors)
Sexual debut Independent housing Union Child
Slum residence (ref. Viwandani)
Korogocho 0.67 (0.05)*** 0.71 (0.08)*** 0.75 (0.11)** 1.05 (0.13)
Age group (ref. 18–22)
12–14 0.56 (0.11)*** 0.68 (0.28) 8.99 (4.93)*** 2.74 (1.81)
15–17 0.72 (0.07)*** 1.25 (0.19) 0.93 (0.22) 1.14 (0.25)
Gender (ref. female)
Male 0.99 (0.06) 2.49 (0.22)*** 0.16 (0.02)*** 0.24 (0.03)***
Socioeconomic status (ref. middle)
Least wealthy 0.91 (0.06) 0.98 (0.09) 1.22 (0.15) 0.96 (0.11)
Most wealthy 1.00 (0.07) 0.69 (0.08)*** 1.17 (0.16) 1.24 (0.15)*
Ethnic group (ref. Kikuyu)
Luhya 1.09 (0.10) 0.69 (0.09)*** 1.05 (0.18) 1.27 (0.20)
Luo 1.14 (0.10) 0.55 (0.08)*** 1.35 (0.22)* 0.98 (0.15)
Kamba 0.81 (0.07)** 0.85 (0.09) 0.93 (0.15) 0.78 (0.11)*
Somali 0.40 (0.10)*** 0.35 (0.11)*** 1.24 (0.60) 0.38 (0.14)***
Other 0.97 (0.11) 0.68 (0.10)*** 1.41 (0.27)* 0.71 (0.14)*
Religion (ref. Catholic)
No religion 0.79 (0.09)** 0.96 (0.13) 1.10 (0.22) 0.87 (0.16)
Protestant 0.75 (0.09)** 0.93 (0.10) 1.01 (0.15) 0.93 (0.12)
Pentecostal/other Christian 0.75 (0.09)** 0.76 (0.09)** 1.30 (0.19)* 0.83 (0.11)
Muslim 0.82 (0.19) 1.51 (0.42) 1.05 (0.50) 1.56 (0.53)
Other 0.67 (0.11)** 1.19 (0.22) 1.23 (0.28) 0.74 (0.17)
Educational level (ref. primary)
No education 1.26 (0.31) 1.56 (0.56) 1.69 (0.57) 1.52 (0.37)*
Secondary or higher 1.16 (0.28) 0.82 (0.07)** 0.50 (0.06)*** 0.66 (0.08)***
Other 1.19 (0.70) 2.36 (1.06)* 0.68 (0.39) 2.54 (1.39)*
Currently in school 0.39 (0.03)*** 0.36 (0.05)*** 0.03 (0.01)*** 0.05 (0.03)***
Slum born 0.92 (0.07) 0.82 (0.08)** 0.76 (0.10)** 0.99 (0.12)
Ever used contraception       0.82 (0.10)
Married/Lives together 6.33 (0.79)*** 2.41 (0.38)***   9.82 (1.13)***
Lives in an independent housing 1.27 (0.13)**   1.77 (0.26)*** 1.41 (0.15)***
Experience first sex   1.56 (0.15)***    
Has first child   0.56 (0.10)*** 1.17 (0.21)  
Wald Chi-square 656.300*** 407.158*** 291.274*** 1,029.982***
Subjects (events) 3,944 (1,253) 3,944 (656) 3,944 (407) 3,944 (453)
Time at risk (person-years) 62,631.040 65,880.274 66,556.446 66,583.285

*p < 0.1, **p < 0.05, ***p < 0.01