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Table 4 Hazard ratio (with 95% CI) for delayed vaccination of MCV1 and MCV2 among children aged 24–35 months, in Zhejiang province (Cox proportional hazard regression, N = 1386) a

From: Measles vaccination coverage, determinants of delayed vaccination and reasons for non-vaccination among children aged 24–35 months in Zhejiang province, China

Demographic and socio-economic variables MCV1 MCV2
Number of siblings 1 1 1
2 1.2 (0.9–1.8) 1.1 (0.9–1.5)
≥3 1.6 (1.1–2.0) * 2.3 (1.6–3.5) **
Place of delivery Hospital 1 1
Home 1.1 (0.8–1.7) 1.7 (1.3–2.8) *
Age of mothers (years) < 30 1 1
≥30 0.9 (0.7–1.24) 0.8 (0.6–0.9) *
Mother’s education level < senior middle school 1 1
≥ senior middle school 0.8 (0.6–1.2) 0.7 (0.5–0.9) *
Maternal employment status Home fulltime 1 1
Employed 1.2 (0.8–1.5) 2.3 (1.8–4.0) **
Immigration status Resident 1 1
Non-local 2.6 (1.9–4.7) * 2.9 (2.2–5.3) **
Family income per month b 0.9 (0.8–1.0) 0.8 (0.7–0.9) *
  1. a: two variables (sex and residence) were excluded from the backwards model selection
  2. b: continuous variable, increasing direction. HR presented in bold were significant with *p < 0.05; **p < 0.01