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Table 4 Joint effects of inhalants and NPC family history on nasopharyngeal carcinoma

From: Household inhalants exposure and nasopharyngeal carcinoma risk: a large-scale case-control study in Guangdong, China

Exposure factors

Without NPC family history

Without NPC family history

Case

Control

OR (95 % CI)a

Case

Control

OR (95 % CI)a

Incense use

 Never

249

534

1.00 (reference)

38

23

3.44 (1.94, 6.10)

 Frequent

932

937

1.72 (1.41, 2.10)

196

58

6.15 (4.32, 8.74)

Synergistic indexb

SI = 1.63 (0.80, 3.30)

 

Wood stove use

 No

491

1035

1.00 (reference)

91

57

3.67 (2.51, 5.36)

 Yes

1046

1040

1.94 (1.63, 2.32)

213

59

7.39 (5.26, 10.37)

Synergistic indexb

SI = 1.77 (1.06, 2.96)

 
  1. aORs (odds ratios) were adjusted for age (years, continuous variable), sex (male, female), education (high school or less, college or more), housing type (block, bungalow), cigarette smoking pack-years (never smoker, less than 20 pack-years, more than 20 pack-years), salted fish (less than monthly, monthly, weekly or more), preserved vegetables (less than monthly, monthly, weekly or more), tea (less than monthly, monthly, weekly or more), herbal tea (less than monthly, monthly, weekly or more), and slow-cooked soup (less than monthly, monthly, weekly or more)
  2. bThe synergy index for household inhalant exposure and NPC family history
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BMC Cancer

ISSN: 1471-2407

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