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Table 2 Bivariate association between substance use outcomes, age at menarche and other potential covariates among 14-15 year old Canadian girls

From: Age at menarche and current substance use among Canadian adolescent girls: results of a cross-sectional study

  Current Smoking Drunk in the past 12 months Drugs in the past 12 months
  N*(%)** OR (95% CI)† N*(%)** OR (95% CI)† N*(%)** OR (95% CI)†
Age at menarche       
   Early 28 (30.9) 2.42 (0.76-7.64) 41 (46.2) 1.86 (0.74-4.68) 27 (30.0) 3.46 (0.85-14.07)
   Average 104 (21.6) 1.48 (0.55-4.00) 181 (37.4) 1.30 (0.62-2.72) 136 (28.1) 3.15 (0.84-11.83)
   Late 15 (15.6) 1 31 (31.6) 1 11 (11.02) 1
Household income       
   Lowest & Lower middle 10 (21.6) 1.44 (0.47-4.43) 21 (45.0) 1.68 (0.50-5.66) 10 (22.5) 0.88 (0.26-3.00)
   Middle 41 (25.6) 1.80 (0.84-3.89) 69 (43.2) 1.56 (0.81-3.01) 42 (26.4) 1.09 (0.53-2.27)
   Upper middle 58 (25.7) 1.81 (0.94-3.49) 85 (37.8) 1.24 (0.69-2.23) 61 (27.2) 1.14 (0.62-2.07)
   Highest 39 (16.1) 1 79 (32.8) 1 60 (24.8) 1
Residence       
   Rural 19 (24.9) 1.20 (0.67-2.17) 38 (48.6) 1.66 (0.95-2.89) 27 (35.6) 1.69 (0.95-3.03)
   Urban 128 (21.6) 1 216 (36.3) 1 146 (24.6) 1
PMK education       
   Less than secondary 20 (28.9) 2.01 (0.84-4.86) 28 (41.0) 1.51 (0.69-3.28) 20 (29.2) 1.56 (0.65-3.72)
   Secondary school graduation 38 (24.4) 1.60 (0.80-3.18) 65 (41.8) 1.56 (0.86-2.81) 40 (25.7) 1.30 (0.69-2.47)
   Beyond high school 39 (24.8) 1.64 (0.83-3.24) 62 (39.3) 1.40 (0.75-2.62) 52 (32.9) 1.85 (0.94-3.62)
   College or university degree 47 (16.8) 1 90 (31.6) 1 59 (20.9) 1
Province of residence‡       
   Eastern 16 (28.8) 2.07 (1.06-4.06) 21 (38.2) 0.83 (0.45-1.54) 15 (27.4) 1.35 (0.66-2.77)
   Central 100 (23.6) 1.58 (0.90-2.79) 151 (35.5) 0.74 (0.43-1.26) 116 (27.4) 1.35 (0.75-2.43)
   Western 31 (16.3) 1 82 (42.7) 1 42 (21.8) 1
PMK immigration status       
   No 131 (23.8) 2.11 (0.83-5.40) 215 (39.0) 1.67 (0.75-3.73) 149 (27.1) 1.61 (0.69-3.74)
   Yes 14 (12.9) 1 31 (27.7) 1 21 (18.7) 1
Living with both parents       
   No 38 (29.5) 1.66 (0.91-3.04) 59 (45.6) 1.50 (0.81-2.76) 43 (33.1) 1.56 (0.82-2.99)
   Yes 109 (20.1) 1 194 (35.9) 1 130 (24.1) 1
Relationship with mother       
   Very close 52 (16.0) 1 102 (31.2) 1 66 (20.3) 1
   Somewhat close 71 (25.4) 1.79 (1.02-3.13) 116 (41.6) 1.57 (0.97-2.53) 86 (30.7) 1.74 (1.01-3.00)
   Not very close 21 (37.4) 3.12 (1.10-8.89) 31 (54.4) 2.63 (0.91-7.57) 20 (34.2) 2.04 (0.76-5.44)
Relationship with father       
   Very close 32 (14.1) 1 65 (28.6) 1 36 (15.9) 1
   Somewhat close 60 (20.8) 1.61 (0.87-2.97) 108 (37.6) 1.50 (0.86-2.62) 77 (26.8) 1.94 (1.09-3.44)
   Not very close 42 (39.5) 3.99 (1.95-8.18) 62 (57.6) 3.39 (1.68-6.85) 45 (41.9) 3.82 (1.88-7.76)
Work for pay       
   No 32 (25.0) 1 42 (33.1) 1 28 (22.1) 1
   Yes 116 (21.6) 0.83 (0.44-1.56) 212 (39.4) 1.32 (0.79-2.20) 146 (27.1) 1.31 (0.72-2.38)
School performance       
   Very well/Well 58 (13.9) 1 125 (29.9) 1 78 (18.6) 1
   Average/Poor/Very poor 80 (35.0) 3.33 (1.96-5.68) 118 (51.3) 2.47 (1.49-4.10) 84 (36.9) 2.57 (1.56-4.23)
Self score - 0.86 (0.78-0.95) - 0.89 (0.82-0.96) - 0.89 (0.81-0.97)
  1. * Sample size is estimated using normalized weights
  2. ** Frequencies are row percentages estimated using normalized weights.
  3. † 95% CI were calculated using bootstrapping technique
  4. ‡ Eastern Atlantic: Newfoundland & Labrador, Nova Scotia, Prince Edward Island & New Brunswick; Eastern Central: Quebec & Ontario; Western Prairies: Manitoba, Saskatchewan, & Alberta; Western British Columbia: British Columbia