Table 4 Factors associated with time to start vaccinations (hazard ratios and 95 % confidence intervals from multivariable Cox proportional hazard regression with shared frailty)^a

Gender

HR (95 % CI)

HR (95 % CI)

HR (95 % CI)

HR (95 % CI)

 Male vs. female

0.89 (0.78–1.02)

0.94 (0.82–1.08)

1.03 (0.95–1.10)

0.94 (0.87–1.02)

Childhood place of residence

 Urban vs. rural

0.73 (0.57–0.92)

0.83 (0.67–1.03)

1.01 (0.82–1.25)

1.03 (0.85–1.23)

Birth order

 1 vs. 3+

0.63 (0.40–1.01)

0.97 (0.60–1.55)

1.01 (0.87–1.17)

1.02 (0.87–1.20)

 2 vs. 3+

0.61 (0.39–0.96)

0.84 (0.52–1.34)

0.96 (0.84–1.11)

1.00 (0.86–1.15)

 3 vs. 3+

0.55 (0.34–0.89)

0.80 (0.50–1.29)

1.04 (0.92–1.18)

1.10 (0.96–1.26)

Mother’s age

 15–19 vs. 45–49

6.14 (1.76–21.42)

3.42 (0.89–13.17)

1.19 (0.69–2.04)

1.04 (0.51–2.09)

 20–24 vs. 45–49

5.39 (1.73–16.83)

2.51 (0.80–7.82)

0.95 (0.65–1.39)

1.10 (0.75–1.61)

 25–29 vs. 45–49

5.24 (1.70–16.19)

2.76 (0.90–8.54)

0.91 (0.63–1.31)

1.13 (0.78–1.62)

 30–34 vs. 45–49

4.77 (1.54–14.73)

2.47 (0.80–7.64)

0.89 (0.62–1.28)

1.12 (0.78–1.60)

 35–39 vs. 45–49

4.52 (1.44–14.17)

2.31 (0.74–7.23)

0.92 (0.64–1.33)

1.11 (0.77–1.59)

 40–44 vs. 45–49

4.93 (1.46–16.75)

2.26 (0.67–7.60)

1.00 (0.68–1.47)

1.23 (0.84–1.79)

Mother’s education

 Secondary vs. higher

0.95 (0.82–1.10)

0.91 (0.78–1.07)

0.95 (0.88–1.03)

1.01 (0.92–1.10)

Wealth index

 Poorest vs. richest

0.92 (0.65–1.30)

0.97 (0.69–1.35)

1.14 (0.89–1.46)

0.89 (0.69–1.13)

 Poor vs. richest

1.08 (0.81–1.45)

1.01 (0.76–1.34)

1.15 (0.90–1.47)

0.85 (0.66–1.09)

 Middle vs. richest

0.96 (0.73–1.26)

0.88 (0.68–1.14)

1.15 (0.90–1.47)

0.91 (0.71–1.16)

 Rich vs. richest

1.03 (0.80–1.33)

0.95 (0.74–1.21)

1.13 (0.92–1.40)

0.92 (0.75–1.14)

Region

 Aragatsotn vs. Yerevan (capital)

1.00 (0.67–1.49)

0.98 (0.69–1.40)

-

-

 Ararat vs. Yerevan (capital)

0.84 (0.56–1.27)

0.85 (0.59–1.21)

-

-

 Armavir vs. Yerevan (capital)

0.60 (0.40–0.91)

0.71 (0.49–1.02)

-

-

 Gegharkunik vs. Yerevan (capital)

1.05 (0.72–1.54)

0.74 (0.53–1.04)

-

-

 Lori vs. Yerevan (capital)

0.81 (0.52–1.24)

0.89 (0.62–1.29)

-

-

 Kotayk vs. Yerevan (capital)

0.87 (0.60–1.28)

0.86 (0.62–1.20)

-

-

 Shirak vs. Yerevan (capital)

1.31 (0.90–1.91)

1.23 (0.89–1.72)

-

-

 Syunik vs. Yerevan (capital)

0.39 (0.26–0.60)

0.38 (0.26–0.55)

-

-

 VayotsDzor vs. Yerevan (capital)

0.77 (0.51–1.16)

0.77 (0.53–1.10)

-

-

 Tavush vs. Yerevan (capital)

0.86 (0.59–1.26)

0.72 (0.52–1.01)

-

-

  Issyk-Kul vs. Bishkek (capital)

-

-

2.93 (2.10–4.10)

1.34 (1.01–1.79)

  Djalal-Abad vs. Bishkek (capital)

-

-

4.03 (2.89–5.64)

1.76 (1.33–3.32)

  Naryn vs. Bishkek (capital)

-

-

1.96 (1.38–2.77)

1.21 (0.90–1.62)

  Batken vs. Bishkek (capital)

-

-

1.94 (1.39–2.71)

0.94 (0.70–1.25)

  Osh Oblast vs. Bishkek (capital)

-

-

1.59 (1.13–2.23)

1.24 (0.93–1.65)

  Talas vs. Bishkek (capital)

-

-

2.49 (1.78–3.50)

1.53 (1.15–2.04)

  Chui vs. Bishkek (capital)

-

-

2.55 (1.79–3.62)

1.10 (0.82–1.48)

  Osh City vs. Bishkek (capital)

-

-

2.73 (2.00–3.71)

1.57 (1.20–2.05)