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Table 2 Mean body mass index, percent body fat and waist circumference of women (n = 365) by selected socio-demographic characteristics

From: Predictors of overweight and obesity in adult women in Nairobi Province, Kenya

  Mean BMI (SD) Mean% body fat (SD) Mean WC (SD)
Mean 27.9 (5.3) 39.5 (7.6) 86.9 (13.5)
Age (years) P <0.001c P <0.001 c P <0.001 c
25-29 25.6 (5.0) 35.7 (6.6) 80.7 (11.2
30-34 28.1 (4.4) 39.3 (6.3) 86.0 (11.0)
35-39 28.7 (4.6) 40.8 (6.7) 87.7 (8.7)
40-44 28.9 (5.5) 41.7 (7.5) 90.1 (9.1)
45-49 28.8 (6.5) 41.2 (7.8) 90.9 (18.4)
50-54 31.8 (4.7) 46.6 (7.8) 99.5 (14.6)
Socio-economic group P = 0.005b P = 0.021a P = 0.083
Lower 26.4 (5.2) 37.6 (6.8) 86.1 (12.2)
Upper-lower 27.6 (4.8) 39.2(7.9) 85.9 (12.2)
Middle 27.7 (4.9) 39.3(7.8) 84.5 (11.8)
Lower-upper 29.5 (%.3) 41.1(7.1) 90.3 (14.7)
Upper 29.1 (6.3) 42.1 (8.3) 88.8 (17.7)
Marital status P = 0.01a P = 0.06 P <0.001 c
Single 26.1 (4.8) 37.8 (8.0) 82.4 (11.9)
Married 28.3 (5.4) 39.9 (7.1) 87.6 (13.2)
Divorced/separated 30.1 (4.8) 42.5 (8.9) 93.0 (16.2)
Widowed 29.5 (4.7) 41.1 (8.5) 93.0 (14.3)
Parity P <0.001 c P <0.001 c P <0.001 c
0-1 child 26.4 (5.0) 37.6 (7.3) 82.5 (12.8)
2-3children 28.1 (4.6) 39.8 (6.6) 86.5 (11.5)
> = 4 children 30.0 (5.8) 42.1 (8.8) 94.3 (14.2)
Education level P = 0.744 P = 0.764 P = 0.123
None 27.7 (5.3) 40.1 (8.9) 89.1 (15.2)
Primary 28.4 (5.4) 39.9 (7.3) 89.0 (13.1)
Secondary 27.6 (6.4) 38.7 (8.8) 85.8(14.9)
>Secondary 27.8 (4.7) 39.5 (6.9) 85.3 (12.4)
Occupation P = 0.366 P = 0.471 P = 0.314
Casual worker 26.9 (6.3) 37.4 (7.9) 86.6 (15.7)
Self employed 28.7 (5.3) 40.3 (7.5) 89.2 (13.5)
Formal sector 27.7 (4.8) 39.4 (6.9) 85.5 (12.3)
Housewife 27.6 (5.5) 39.7 (8.4) 86.1 (13.7)
Other 26.9(6.0) 38.0 (10.1) 86.0 (17.3)
Number rooms P <0.001 c P <.0.001 c P <0.001 c
1-2 26.8 (5.4) 37.6 (7.0) 84.9 (12.4)
3-4 27.8 (4.6) 40.0 (7.0) 85.4 (11.5)
5-6 30.3 (5.4) 42.7 (7.6) 92.6 (15.4)
> = 7 28.9 (5.2) 40.9 (8.5) 90.7 (16.2)
Expenditure (Ksh) P <0.001 c P <0.001 c P = 0.014a
<10 000 26.2 (5.1) 37.2 (7.7) 83.8 (12.7)
10 001–20 000 28.1 (5.3) 39.8 (7.2) 86.8 (12.5)
20 001–30 000 28.9 (4.8) 41.4 (7.5) 88.8 (12.4)
30 001–40 000 29.4 (5.6) 40.4 (8.1) 91.7 (16.7)
> = 40 000 29.7 (4.9) 42.3 (6.7) 89.4 (14.7)
  1. BMI = body mass index; WC = waist circumference; SD = standard deviation; Ksh = Kenyan shillings.
  2. a Significant differences at p <0.05; b Significant differences at p <0.01; c Significant differences at p <0.001.