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Table 2 Comparisons of measured variables and calculation of odds ratio: in univariate analysis

From: Acne keloidalis nuchae and hypertension in black subjects: a case–control study

Variables

Cases (n = 101)

Controls (n = 202)

p-value

Mean age (years) ± standard deviation

34.91 ± 10.7

35.62 ± 11.2

NC

Mean BMI (Kg/m2) ± standard deviation

27.0 ± 4.5

23.7 ± 2.9

< 0.001 T

Mean systolic blood pressure (mmHg) ± standard deviation

126.7 ± 22.50

115.7 ± 14.24

< 0.001 T

Mean diastolic blood pressure (mmHg) ± standard deviation

83.07 ± 15.86

75.74 ± 13.06

0.001 T

BMI (kg/m2), n (%)

 < 25

36 (35.6)

147 (72.8)

 ≥ 25

65 (64.4)

55 (27.2)

< 0.001a

Blood pressure, n (%)

 Systolic hypertension

  No

77 (76.2)

186 (92.1)

0.009a

  Yes

24 (23.8)

16 (7.9)

 

 Diastolic hypertension

  No

67 (66.3)

143 (70.8)

0.461a

  Yes

34 (33.7)

59 (29.2)

 
  1. NC: pairing variable of the two groups; BMI: body mass index; T: student test for paired samples; aMcNemar's test