TABLE 1.

Sociodemographic Characteristics of Participants in Study of Effects of Household Income on Willingness to Pay for Hepatitis B Vaccine, Hanoi, Vietnam, (n=695)

Income Quintiles
Q1Q2Q3Q4Q5TotalP Value  
Total, n (%)124 (17.8)211 (30.4)131 (18.9)120 (17.3)109 (15.7)695 (100.0)
Mean age, years26.826.228.127.627.127.0.06
Mean household monthly income, US$187.0389.6611.6830.01612.8663.2<.01a
Married, n (%)120 (96.8)204 (97.1)130 (100.0)117 (98.3)108 (100.0)679 (98.3).12
Living in rural area, n (%)107 (90.7)151 (72.6)42 (32.6)25 (21.4)14 (12.8)339 (49.8)<.01a
Having any children, n (%)119 (96.0)192 (91.0)119 (90.8)110 (91.7)101 (92.7)641 (92.2).51
Education, n (%)
 ≤ Secondary48 (38.7)29 (13.7)10 (7.6)5 (4.2)2 (1.8)94 (13.5)<.01a
 High51 (41.1)85 (40.3)40 (30.5)20 (16.7)19 (17.4)215 (30.9)
 Vocational training13 (10.5)52 (24.6)27 (20.6)31 (25.8)16 (14.7)139 (20.0)
 University12 (9.7)45 (21.3)54 (41.2)64 (53.3)72 (66.1)247 (35.5)
  • a Significant at P<.05.