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Table 1 Baseline characteristics of participants

From: Suture restriction of the temporal bone as a risk factor for acute otitis media in children: cohort study

Characteristics All Without severe restriction With severe restriction  
  (n = 64) (n = 41) (n = 23)  
Continuous variables Mean (SD) Mean (SD) Mean (SD) P Value
Age, months 9.9 (3.1) 9.7 (3.1) 10.4 (3.1) 0.38 a
Birth weight, g 3373 (554) 3410 (476) 3307 (677) 0.48 a
Gestational age, weeks 39.6 (1.8) 40.0 (1.4) 39.0 (2.3) 0.07 a
Categorical variables Frequency (%) Frequency (%) Frequency (%) P Value
Gender (Boy) 35 (54.7) 23 (56.1) 12 (52.2) 0.76 b
Use of pacifier (Yes) 46 (71.9) 30 (73.2) 16 (69.6) 0.76 b
Daycare attendance (Yes) 43 (67.2) 27 (65.9) 16 (69.6) 0.76 b
Siblings (Yes) 28 (43.8) 19 (46.3) 9 (39.1) 0.58 b
Low socioeconomic status (< $30,000/year) 13 (20.3) 8 (19.5) 5 (21.7) 1.00 c
Breastfeeding ≥ 6 months (Yes) 43 (67.2) 29 (70.7) 14 (60.9) 0.42 b
Parental smoking (Yes) 16 (25.0) 7 (17.1) 9 (39.1) 0.05 c
History of URTI (Yes) 11 (17.2) 7 (17.1) 4 (17.4) 1.00 c
 Bronchiolitis 7 (10.9) 4 (9.8) 3 (13.0) 0.70 c
 Sinusitis 2 (3.1) 1 (2.4) 1 (4.3) 1.00 c
 Pneumonia 3 (4.7) 3 (7.1) 0 (0) 0.55 c
  1. SD: standard deviation, g: gram, URTI: upper respiratory tract infection.
  2. a P Value of the T Test. b P Value of the Chi-square Test. c P Value of the Exact Fischer Test.