Table 2 Baseline characteristics of study participants presented with number (n) and percentages, determinants of untimely vaccination, and determinants of incomplete vaccination at end of follow-up presented with hazard ratios (HR) with 95% confidence interval assessed with a cluster adjusted Cox regression model.
From: Vaccination coverage and timeliness in three South African areas: a prospective study
n (%) 765 | HR for untimely Unadjusted model | vaccination (95%CI) Adjusted model | HR for incomplete Unadjusted model | vaccination (95%CI) Adjusted model | |
|---|---|---|---|---|---|
Mother's age | |||||
≤ 19 | 265 (23) | 1 | 1 | ||
20 - 24 | 387 (34) | 0.77 (0.57-1.0) | 0.70 (0.47-1.1) | ||
25 - 29 | 249 (22) | 0.91 (0.68-1.2) | 0.59 (0.41-0.85) | ||
≥ 30 | 234 (21) | 0.90 (0.65-1.2) | 0.96 (0.66-1.4) | ||
Marital status | * | * | |||
Married or cohabiting | 712 (63) | 1 | 1 | ||
Single, widowed, separated or divorced | 422 (37) | 0.64 (0.51-0.81) | 0.65 (0.45-0.95) | ||
Gender of infant | |||||
Girl | 568 (50) | 1 | 1 | 1 | |
Boy | 559 (50) | 1.3 (1.0-1.6) | 1.2 (0.92-1.5) | 0.95 (0.68-1.3) | |
Mother's education | * | ||||
Primary (0-7 years) | 142 (11) | 1 | 1 | ||
Secondary (8-11 years) | 756 (59) | 1.2 (0.80-1.7) | 0.62 (0.40-0.96) | ||
Higher (12 or above) | 378 (30) | 0.81 (0.53-1.2) | 0.31 (0.19-0.53) | ||
Socio economic wealth index | * | * | |||
Least poor quintile | 234 (21) | 1 | 1 | ||
4th quintile | 253 (22) | 0.91 (0.56-1.5) | 1.4 (0.70-3.0) | ||
3rd quintile | 223 (20) | 1.1 (0.69-1.8) | 2.2 (1.1-4.4) | ||
2nd quintile | 210 (18) | 1.5 (1.0-2.4) | 3.6 (1.8-7.0) | ||
Poorest quintile | 217 (19) | 2.4 (1.6-3.6) | 7.5 (4.0-14) | ||
Living area | * | * | * | * | |
Paarl | 349 (31) | 1 | 1 | 1 | 1 |
Rietvlei | 305 (27) | 3.8 (2.7-5.5) | 3.3 (2.3-4.7) | 7.4 (4.4-13) | 7.2 (4.7-11) |
Umlazi | 480 (42) | 1.7 (1.3-2.4) | 1.6 (1.2-2.3) | 1.9 (1.1-3.5) | 2.2 (1.3-3.7) |
Place of delivery | * | * | * | ||
Home | 68 (6) | 1 | 1 | 1 | |
In health facility | 1021 (94) | 0.37 (0.26-0.54) | 0.53 (0.38-0.74) | 0.36 (0.20-0.64) | |
Health councelling | * | * | |||
Normal | 485 (43) | 1 | 1 | 1 | |
Additional peer-counselling | 535 (47) | 0.88 (0.56-1.4) | 0.67 (0.35-1.28) | 0.64 (0.49-0.83) | |
Intention to formula feed | 117 (10) | 0.74 (0.41-1.3) | 0.40 (0.16-0.96) | 0.39 (0.18-0.89) | |
Number of siblings | * | * | |||
None | 537 (47) | 1 | 1 | 1 | |
1 - 2 | 464 (41) | 1.0 (0.84-1.3) | 1.3 (1.04-1.7) | 1.3 (0.97-1.7) | |
3 or above | 130 (11) | 1.4 (1.08-1.9) | 2.2 (1.4-3.5) | 1.7 (1.0-2.7) | |
Mother's body mass index (BMI) | |||||
< 20 | 70 (8) | 1 | 1 | ||
20 - 24.9 | 361 (39) | 1.3 (0.76-2.1) | 0.82 (0.44-1.5) | ||
25 - 29.9 | 283 (31) | 1.2 (0.69-2.2) | 0.77 (0.40-1.5) | ||
≥ 30 | 211 (23) | 1.5 (0.88-2.5) | 0.76 (0.43-1.3) |