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Table 1 Descriptive characteristics of children (3–9 years) after hepatitis B vaccination

From: Serologic testing of randomly selected children after hepatitis B vaccination: a cross-sectional population-based study in Lao People’s Democratic Republic

Characteristic Total (n = 911) Undocumented vaccination history (n = 740) Documented vaccination history (n = 171)
No doses (n = 10) 1 dose (n = 5) 2 doses (n = 9) ≥ 3 doses (n = 147)
n (%) n (%) n (%) n (%) n (%) n (%)
Sex
 Male 453 (49.7) 379 (51.2) 4 (40.0) 3 (60.0) 1 (11.1) 66 (44.9)
 Female 458 (50.3) 361 (48.8) 6 (60.0) 2 (40.0) 8 (88.9) 81 (55.1)
Birthplace
 Provincial hospital 205 (22.5) 133 (18.0) 3 (30.0) 2 (40.0) 4 (44.4) 63 (42.9)
 District hospital 105 (11.5) 85 (11.5) 1 (10.0) 2 (40.0) 0 (0.0) 17 (11.6)
 Health center 30 (3.3) 26 (3.5) 0 (0.0) 0 (0.0) 0 (0.0) 4 (2.7)
 Private clinic 18 (2.0) 17 (2.3) 0 (0.0) 0 (0.0) 0 (0.0) 1 (0.7)
 Home with visiting medical staff 535 (58.7) 467 (63.1) 6 (60.0) 1 (20.0) 5 (55.6) 56 (38.1)
 At or near the home 18 (2.0) 12 (1.6) 0 (0.0) 0 (0.0) 0 (0.0) 6 (4.1)
Vaccination site
 Hospital 153 (16.8) 109 (14.7) 1 (10.0) 2 (40.0) 0 (0.0) 41 (27.9)
 Health center 105 (11.5) 82 (11.1) 0 (0.0) 0 (0.0) 1 (11.1) 22 (15.0)
 In the village with medical staff 276 (30.3) 233 (31.5) 2 (20.0) 0 (0.0) 4 (44.4) 37 (25.2)
 Private doctor 6 (0.7) 4 (0.5) 0 (0.0) 0 (0.0) 0 (0.0) 2 (1.4)
 Do not remember 6 (0.7) 5 (0.7) 0 (0.0) 0 (0.0) 0 (0.0) 1 (0.7)
 Other 8 (0.9) 5 (0.7) 0 (0.0) 0 (0.0) 0 (0.0) 3 (2.0)
 Not known/reported 357 (39.2) 302 (40.8) 7 (70.0) 3 (60.0) 4 (44.4) 41 (27.9)
Mother’s ethnicity
 Lowland Lao 783 (85.9) 635 (85.8) 10 (100.0) 5 (100.0) 8 (88.9) 125 (85)
 Highland Lao 83 (9.1) 71 (9.6) 0 (0.0) 0 (0.0) 1 (11.1) 11 (7.5)
 Hmong 5 (0.5) 5 (0.7) 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0)
 Unknown 40 (4.4) 29 (3.9) 0 (0.0) 0 (0.0) 0 (0.0) 11 (7.5)