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Table 2 Age and Sex related frequency of occurrence of various forms of onchocerca skin diseases among residents of Hawal river valley

From: Epidemiology and psycho-social aspects of onchocercal skin diseases in northeastern Nigeria

  Age Group(Years) No Examined *Forms APOD CPOD LOD ATR DPM Total  
Males ≤ 10 461   81(17.6) 56(12.1) 18(3.9) 0(0.0) 21(4.6) 176(38.2)  
  11 – 20 447   68(15.2) 64(14.3) 25(5.6) 12(2.7) 25(5.6) 194(43.4)  
  21 – 30 523   56(10.7) 94(18.0) 31(5.9) 18(3.4) 49(9.4) 248(47.4) n = 1346
  31 – 40 556   44(7.9) 101(18.2) 49(8.8) 20(3.6) 54(9.7) 268(48.2)  
  41 – 50 548   31(5.7) 108(19.7) 50(9.1) 23(4.2) 55(10.0) 267(48.1)  
  ≥ 50 507   20(3.9) 88(17.4) 50(9.9) 23(4.5) 54(10.7) 235(46.4)  
  Total 3042   300(9.9) 511(16.8) 223(1.3) 96(3.2) 258(8.5) 388(45.6)  
Females ≥ 10 417   79(18.9) 54(12.9) 15(3.6) 0(0.0) 30(7.2) 178(42.7)  
  11 – 20 454   67(14.8) 71(15.6) 23(5.1) 10(2.2) 38(8.4) 209(46.0)  
  21 – 30 461   46(10.0) 87(18.9) 24(5.2) 20(4.3) 45(9.8) 22(48.2) n = 1212
  31 – 40 450   42(9.3) 108(24.0) 28(6.2) 17(3.8) 47(10.4) 42(53.2)  
  41 – 50 498   25(5.0) 104(20.9) 47(9.4) 19(3.8) 52(10.4) 47(49.6)  
  ≥ 50 522   17(3.3) 99(19.0) 50(9.6) 22(4.2) 55(10.5) 43(46.6)  
  Total 2802   276(9.9) 523(18.7) 187(6.7) 88(3.1) 267(9.5) 341(47.9)  
  1. • Subjects with two or more forms encountered.
  2. APOD = Acute Papular Onchocerca Dermatitis.
  3. CPOD = Chronic Papular Onchocerca Dermatitis.
  4. LOD = Lichenified Onchocerca Dermatitis.
  5. ATR = Atrophy.
  6. DPM = Depigmentation