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Table 5 Mean health (standard deviation) score according to the SF-12 questionnaire among 238 children visiting two schools in Yunnan province, P.R. China, stratified by helminth infection (A. lumbricoides, hookworm, T. trichiura) and school.

From: Self-rated quality of life and school performance in relation to helminth infections: case study from Yunnan, People's Republic of China

Parameter Obs. Dimension
   PF RF BP GH V SF RE MH PCS MCS
A. lumbricoides            
   Bulangshan            
Not infected 46 76 (24) 57 (41) 73 (20) 69 (27) 45 (27) 67 (27) 55 (42) 59 (18) 66 (26) 57 (25)
Infected 98 75 (24) 53 (40) 76 (16) 72 (26) 54 (28) 72 (23) 51 (42) 64 (19) 64 (25) 58 (25)
   Pu'er            
Not infected 85 78 (23) 68 (40)a 69 (17) 72 (29) 62 (21) 82 (7) 33 (43) 68 (16) 56 (25)a 51 (24)
Infected 9 81 (24) 33 (43) 79 (16) 75 (23) 61 (22) 79 (18) 55 (43) 65 (18) 74 (26) 60 (26)
Hookworm            
   Bulangshan            
Not infected 34 76 (24) 58 (40) 73 (20) 69 (26) 46 (27) 68 (26) 56 (41) 58 (18)a 67 (25) 57 (24)
Infected 110 74 (26) 47 (43) 76 (17) 74 (27) 54 (29) 69 (25) 46 (43) 69 (18) 61 (28) 57 (27)
   Pu'er            
Not infected 64 73 (26) 63 (41) 75 (11) 73 (23) 56 (20) 77 (19) 50 (42) 62 (21) 68 (25) 56 (25)
Infected 30 84 (22) 65 (41) 79 (17) 75 (24) 64 (23) 80 (17) 55 (44) 67 (16) 74 (27) 61 (26)
T. trichiura            
   Bulangshan            
Not infected 44 76 (24) 59 (40) 74 (21) 70 (27) 47 (28) 68 (27) 58 (41) 60 (19) 68 (25) 59 (25)
Infected 100 74 (25) 48 (42) 75 (14) 69 (27) 50 (26) 69 (23) 44 (42) 62 (19) 61 (27) 53 (24)
   Pu'er            
Not infected 81 83 (21) 65 (43) 77 (16) 79 (20) 62 (21) 78 (15) 58 (49) 67 (15) 74 (30) 62 (26)
Infected 13 80 (24) 64 (41) 78 (16) 74 (24) 61 (23) 79 (18) 52 (43) 65 (19) 72 (26) 59 (26)
  1. a Significant at P < 0.05 (Kruskal-Wallis test with 1 d.f.)
  2. PF, physical function; RF, role function; BP, bodily pain; GH, general health; V, vitality; SF, social functioning; RE, role emotional; MH, mental health; PCS, physical component summary; MCS, mental component summary