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Table 1 Multivariate frequency distribution of S. haematobium infection and egg counts and haematuria presence and grading

From: Urogenital schistosomiasis elimination in Zanzibar: accuracy of urine filtration and haematuria reagent strips for diagnosing light intensity Schistosoma haematobium infections

Urine filtration original reading Microhaematuria Microhaematuria grading Macrohaematuria grading
  n % n negative n positive including trace % positive Trace + ++ +++ 1 2 3 4 5 6
Total children examined 39,207   36,675 2532 6.5           
S. haematobium egg-negative 37,077 94.6 36,070 1007 2.7 430 264 205 108 19,070 14,265 3508 223 11 0
S. haematobium egg-positive 2130 5.4 605 1525 71.6 292 290 468 475 801 1030 279 18 2 0
S. haematobium egg counts
 1–5 eggs 740 34.7 369 371 50.1 102 91 116 62 332 216 89 30 0 0
 6–10 eggs 284 13.3 85 199 70.1 52 41 62 44 117 137 28 2 0 0
 11–49 eggs 646 30.3 119 527 81.6 103 113 167 144 234 325 81 6 0 0
 50+ eggs 460 21.6 32 428 93.0 35 45 123 225 118 252 81 7 2 0
Total adults examined 18,155   16,131 2024 11.1           
S. haematobium egg-negative 17,673 97.3 15,985 1688 9.6 541 475 383 289 7275 7972 2250 170 5 1
S. haematobium egg-positive 482 2.7 146 336 69.7 65 62 99 110 157 245 67 11 2 0
S. haematobium egg counts
 1–5 eggs 225 46.7 93 132 58.7 28 40 29 35 80 109 31 5 0 0
 6–10 eggs 64 13.3 18 46 71.9 11 5 19 11 25 27 9 2 1 0
 11–49 eggs 124 25.7 27 97 78.2 17 14 32 34 38 71 13 1 1 0
 50+ eggs 69 14.3 8 61 88.4 9 3 19 30 14 38 14 3 0 0