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Table 5 Characteristics of the subjects according to caffeine consumption level

From: Caffeine consumption, intoxication, and stress among female university students: a cross-sectional study

Characteristic Caffeine consumption (mg/day) P value
Low level (<250 mg) n=214 High level (>250 mg) n=314
Age (year) 20.38 ±1.962 20.25 ±1.90 0.466
College    0.040
 Health 119 (55.60%) 146 (46.50%)  
 Non-health 95 (44.40%) 168 (53.50%)  
Nationality    0.107
 Saudi 208 (97.20%) 311 (99.00%)  
 Non-Saudi 6 (2.80%) 3 (1.00%)  
Marital statusa    0.766
 Single 205 (96.20%) 300 (95.50%)  
 Married 6 (2.80%) 12 (3.80%)  
 Separated 2 (0.90%) 2 (0.60%)  
Kids    0.070
 Have kids 1 (0.50%) 8 (2.50%)  
 Does not have kids 213 (99.50%) 306 (97.50%)  
Incomea    0.236
 Enough 125 (58.70%) 188 (60.30%)  
 Enough with saving 70 (32.90%) 83 (26.60%)  
 Not enough 16 (7.20%) 36 (11.50%)  
 In debt 2 (0.90%) 5 (1.60%)  
Academic level    0.698
 Junior 130 (60.70%) 196 (62.40%)  
 Senior 84 (39.30%) 118 (37.60%)  
GPAa    0.553
 5-4.50 95 (45.70%) 123 (39.70%)  
 4.49-4 64 (30.80%) 111 (35.80%)  
 3.9-3.50 30 (14.40%) 48 (15.50%)  
Less than 3.50 19 (9.10%) 28 (9.00%)  
Academic satisfactiona    0.145
 Very satisfied 48 (22.50%) 71 (22.70%)  
 Satisfied 109 (51.20%) 136 (43.50%)  
 Not satisfied 45 (21.10%) 73 (23.30%)  
 Very unsatisfied 10 (4.70%) 32 (10.20%)  
Chronic diseasesa    0.402
 Diagnosed 17 (7.90%) 19 (6.10%)  
 Not diagnosed 197 (92.10%) 294 (93.90%)  
Psychiatric disordersa    0.027
 Diagnosed 14 (6.50%) 39 (12.40%)  
 Not diagnosed 200 (93.50%) 275 (87.60%)  
Psychiatric helpa    0.693
 Received help 8 (61.50%) 21 (55.30%)  
 Did not receive 5 (38.50%) 17 (44.70%)  
Smokinga    0.704
 Smoker 11 (36.70%) 19 (63.30%)  
 Non-smoker 198 (40.20%) 295 (59.80%)  
Caffeine intoxicationa    0.005
 Intoxication symptoms 17 (25.00%) 51 (75.00%)  
 No intoxication symptoms 196 (42.90%) 261 (57.10%)  
Perceived stress scale 20.27±6.31 21.40±6.38 0.045
  1. Values are presented as mean ± standard deviation or number (%)
  2. aMissing data: 1: marital status, chronic disease, and psychiatric disorder. 2: academic satisfaction. 3: income and psychiatric help. 6: smoking. 10: GPA