Table 1.
Demographic data and comparison between chronic and episodic headache
| Variable | Total n (%) | Episodic headache n (%) | Chronic headache n (%) | OR [95% CI]a | P valueb |
|---|---|---|---|---|---|
| No. of patients | 300/300 (100.0) | 181/300 (60.3) | 119/300 (39.7) | – | – |
| Inpatients | 73/300 (24.3) | 19/181 (10.5) | 54/119 (45.4) | 7.08 [3.69–13.59] | < 0.0001 |
| Outpatients | |||||
| First visit | 140/300 (46.7) | 102/181 (56.4) | 38/119 (31.9) | 0.36 [0.22–0.60] | < 0.0001 |
| Control visit | 87/300 (29.0) | 60/181 (33.1) | 27/119 (22.7) | 0.59 [0.35–1.01] | 0.0512 |
| Mean age ± SD (years) | 42.81 ± 13.21 | 39.54 ± 13.08 | 47.79 ± 11.32 | – | < 0.0001 |
| Range (years) | 18–76 | 18–76 | 18–76 | – | – |
| Females | 286/300 (95.3) | 172/181 (95.0) | 114/119 (95.8) | 1.19 [0.39–3.66] | 0.7573 |
| Education | |||||
| Primary school | 17/300 (5.7) | 11/181 (6.1) | 6/119 (5.0) | 0.82 [0.29–2.29] | 0.7048 |
| Secondary school | 85/300 (28.3) | 51/181 (28.2) | 34/119 (28.6) | 1.02 [0.61–1.70] | 0.9409 |
| High school | 124/300 (41.3) | 75/181 (41.4) | 49/119 (41.2) | 0.99 [0.62–1.58] | 0.9644 |
| University degree | 74/300 (24.7) | 44/181 (24.3) | 30/119 (25.2) | 1.05 [0.61–1.79] | 0.8597 |
| Occupation | |||||
| Employed | 207/300 (69.0) | 119/181 (65.7) | 88/119 (73.9) | 1.48 [0.88–2.47] | 0.1335 |
| Ethnicity | |||||
| Caucasian | 289/300 (96.3) | 171/181 (94.5) | 118/119 (99.2) | 6.90 [0.86–55.68] | 0.0890 |
| African | 8/300 (2.7) | 7/181 (3.9) | 1/119 (0.8) | 0.21 [0.03–1.76] | 0.1120 |
| Asian | 3/300 (1.0) | 3/181 (1.7) | 0/119 (0.0) | 0.00 | 0.1590 |
| Marital status | |||||
| Married | 167/300 (55.7) | 88/181 (48.6) | 79/119 (66.4) | 2.09 [1.28–3.40] | 0.0025 |
Values are n (%) unless otherwise stated
CI confidence interval, OR odds ratio, SD standard deviation
achronic vs episodic headache OR
bp value is derived from a Student’s t test with equal variances for mean age comparison and from a Chi square test for homogeneity of odds for the others