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. 2011 Jan;105(1):65–69. doi: 10.1179/136485910X12851868780342

Table 1. Initial presenting condition of patients.

Test statistic
Feature Controls Combination therapy t χ2 P
no. of patients
 Enrolled 34 35
 Male 19 17 0.369 0.543
 Presenting with:
  Headache 32 32 0.000 1.000
  Vomiting 12 10 0.359 0.549
  Stiff neck 29 28 0.336 0.562
  Fever (⩾37.5°C) 4 3 0.002 0.968
  Skin paresthesia 23 24 0.007 0.934
  Blurred vision or photophobia 6 4 0.153 0.695
age (years)
 Mean and (s.d.) 37.50 (8.51) 35.66 (9.71) 0.838 0.405
 Range 23–57 18–55
Mean (s.d.) incubation period (days)* 12.06 (7.22) 14.94 (8.55) 1.512 0.135
Mean (s.d.) duration of headache before presentation 24.88 (13.32) 20.71 (10.40) 1.451 0.151

*The time between the day when infection is presumed to have occurred and the onset of systems.