The Value of Preoperative Laboratory Investigations in Healthy Individuals Undergoing Elective Cataract Surgeries

Figures & data

Table 1 Patient Demographic Data

Variables	Number (%)
Gender
Male	205 (51.1)
Female	196 (48.9)
Age
Mean (SD)	64.9 (12.6)
Median (min–max)	65.7(19.9–95.9)
Age
<45 years	29 (7.2)
45–59 years	86 (21.4)
≥60 years	286 (71.3)

Abbreviation: SD, standard deviation.

Table 2 Results of the CBC Investigations

Variables	Number (%)
Hb (g/dL)
Normal (12–18)	350 (87.3)
Nonspecific abnormal (≥7–<12)	51 (12.7)
Specific abnormal (<7)	0 (0.0)
Hct (%)
Normal (37–54)	354 (88.3)
Nonspecific abnormal (≥21–<37)	47 (11.7)
Specific abnormal (<21)	0 (0.0)
Platelet (/µL)
Normal (150,000–450,000)	391 (98.0)
Nonspecific abnormal (≥100,000–<150,000)	8 (2.0)
Specific abnormal (<100,000)	0 (0.0)

Abbreviations: CBC, complete bold count; Hb, hemoglobin; Hct, hematocrit.

Table 3 Results of the Anti-HIV, CXR, and EKG Investigations

Variables	Number (%)
Anti-HIV
Non-reactive	400 (99.8)
Inconclusive	1 (0.2)
CXR
Normal	339 (84.5)
Nonspecific abnormal	32 (8.0)
Specific abnormal	30 (7.5)
EKG
Normal	232 (59.8)
Nonspecific abnormal	128 (33.0)
Specific abnormal	28 (7.2)

Notes: Specific abnormal CXRs included tuberculosis infection, lung mass, lung atelectasis, thyroid mass, aortic aneurysm, and hiatal hernia. Specific abnormal EKG findings included myocardial infarction, cardiac arrhythmia, bradycardia, prolonged QT, left ventricular hypertrophy, and second-degree atrioventricular block.

Abbreviations: HIV, human immunodeficiency virus; CXR, chest X-ray; EKG, electrocardiogram.

Figure 1 Bar graph shows the number of patients who had abnormal preoperative laboratory results that required additional management.

Table 4 Cancellation or Postponement of Surgery

Variables	Number (%)
Cancellation/Postponement of surgery with reasons
Yes, due to abnormal preoperative laboratory results	9 (2.2)
Yes, due to other reasons	115 (28.7)
No cancellation/postponement	277 (69.1)
Preoperative investigation that caused cancellation or postponement of the operation
CBC	0 (0.0)
Anti-HIV	0 (0.0)
EKG	2 (0.5)
CXR	7 (1.7)

Abbreviations: CBC, complete blood count; HIV, human immunodeficiency virus; EKG, electrocardiogram; CXR, chest X-ray.

Figure 2 Bar graph showing numbers of patients who cancelled/postponed surgery due to the results of the preoperative investigations.

Table 5 Results of the Univariate Analysis of Risk Factors Associated with Abnormal Preoperative EKG and Cancellation or Postponement of the Operation

Variables	Specific Abnormal Test	Additional Management	Cancellation or Postponement
Gender
Male	19 (9.6)	7 (3.4)	2 (1.0)
Female	9 (4.7)	3 (1.5)	0 (0.0)
p-value	0.060	0.339	0.499
Age group
<60 years	2 (2.0)	0 (0.0)	0 (0.0)
≥60 years	26 (9.1)	10 (3.5)	2 (0.7)
p-value	0.014	0.069	1.000

Note: Data are presented as number (%).

Table 6 Results of the Univariate Analysis of Risk Factors Associated with Specific Abnormal Preoperative CXR and Cancellation or Postponement of the Operation

Variables	Specific Abnormal Test	Additional Management	Cancellation or Postponement
Gender
Male	16 (7.8)	14 (6.8)	5 (2.4)
Female	14 (7.1)	8 (4.1)	2 (1.0)
p-value	0.801	0.227	0.450
Age group
<60 years	4 (3.5)	4 (3.5)	2 (1.7)
≥60 years	26 (9.1)	18 (6.3)	5 (1.8)
p-value	0.059	0.337	1.000

Note: Data are presented as number (%).