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Table 3 Univariate and multivariate analysis of factors associated with adolescent girls and their mothers/guardians’ knowledge about HPV and cervical cancer

From: Knowledge about cervical cancer and HPV immunization dropout rate among Brazilian adolescent girls and their guardians

Populations/CharacteristicsKnowledgeIRR (95%CI)ap-valueIRR (95%CI)bp-value
Low
n (%)
High
n (%)
Adolescent girls
 Age
   ≥ 13 years206 (67.5)99 (32.5)11
  12 years161 (80.9)38 (19.1)1.2 (1. 1-1.3)0.0011.2 (1.1–1.3)0.002
  11 years145 (89.5)17 (10.5)1.3 (1. 2-1.4)0.0001.3 (1. 2-1.4)0.000
 Educational level*
  9th grade of middle school - 1st year of high school40 (51.3)38 (48.7)1
  7th–8th grades of middle school300 (75.4)98 (24.6)1.5 (1. 2-1.8)0.001
   ≤ 6th grade of elementary school171 (90.5)18 (9.5)1.8 (1. 4-2.2)0.000
 Religion
  Catholic373 (74.6)127 (25.4)1
  Others97 (82.2)21 (17.8)1.1 (1.0–1.2)0.053
  No42 (87.5)6 (12.5)1.2 (1.0–1.3)0.008
 Household income (monthly)**
   > US$15009 (47.4)10 (52.6)11
   ≤ US$750401 (77.9)114 (22.1)1.6 (1.0–2.6)0.0411.7 (1. 1-2.6)0.024
  US$751–150083 (76.1)26 (23.9)1.6 (1.0–2.6)0.0551.6 (1.0–2.6)0.032
Mothers/Guardians
 Educational level***
  Higher education (incomplete or complete)27 (54.0)23 (46.0)11
  High school (incomplete or complete)166 (70.6)69 (29.4)1.3 (1.0–1.7)0.0501.2 (0. 9-1.6)0.190
  Illiterate/Elementary school (incomplete or complete)302 (89.9)34 (10.1)1.7 (1. 3-2.2)0.0001.5 (1. 2-2.0)0.003
 Residence area
  Urban290 (76.5)89 (23.5)1
  Rural207 (84.8)37(15.2)1.1 (1.0–1.2)0.009
 Household income (monthly)****
  US$751–150066 (64.1)37 (35.9)11
   > US$15009 (56.3)7 (43.7)0.9 (0. 6-1.4)0.5761.0 (0. 6-1.6)0.936
   ≤ US$750402 (83.4)80 (16.6)1.3 (1. 1-1.5)0.0011.2 (1.0–1.4)0.023
 Marital Status
  Married288 (78.1)81 (21.9)1
  Partner71 (85.5)12 (14.5)1.1 (1.0–1.2)0.083
  Single76 (80.9)18 (19.1)1.0 (0. 9-1.2)0.538
  Widowed27 (81.8)6 (18.2)1.0 (0. 9-1.2)0.586
  Separated/Divorced35 (79.6)9 (20.4)1.0 (0. 9-1.2)0.815
 Religion
  Catholic383 (81.0)90 (19.0)1
  Others99 (78.6)27 (21.4)1.0 (0. 9-1.1)0.560
  No15 (65.5)9 (37.5)0.8 (0. 6-1.1)0.105
  1. aUnivariate analysis, bMultivariate analysis
  2. * One adolescent girl was not attending school. The variable educational level was not included in the multivariate analysis because it is collinear the variable age
  3. ** The household income of adolescent girl was reported by mother/guardian
  4. *** Two guardians did not know their level of education
  5. **** Twenty-two guardians did not report on household income